{"title":"21700 Battery \u0026 Charger","description":"\u003cdetails\u003e\n  \u003csummary style=\"font-weight: bold; cursor: pointer; color: #00917A; font-size: 18px; margin-bottom: 10px;\"\u003e\n    📖 Click to view full specifications, comparison \u0026amp; safety guide\n  \u003c\/summary\u003e\n  \u003cdiv style=\"margin-top: 10px; line-height: 1.6;\"\u003e\n    \u003ch2\u003e21700 Battery \u0026amp; Charger – Next-Gen High-Energy Li-ion Cells + Professional Chargers, Future-Ready Power in One Stop\u003c\/h2\u003e\n    \u003cp\u003eWelcome to our \u003cstrong\u003e21700 Battery \u0026amp; Charger\u003c\/strong\u003e collection. The 21700 lithium-ion cell (approx. 21mm diameter × 70mm length) is the most significant next-generation cylindrical standard following the 18650. Compared to 18650, the 21700 delivers \u003cstrong\u003e50%–100% more capacity with only a ~47% increase in volume\u003c\/strong\u003e, with mainstream capacities from \u003cstrong\u003e3000mAh to 5800mAh\u003c\/strong\u003e and high-drain models supporting \u003cstrong\u003e30A–45A continuous discharge\u003c\/strong\u003e. This collection offers a full range of 21700 cells—High-Capacity, High-Drain, Protected, and LiFePO₄—along with \u003cstrong\u003ededicated Li-ion chargers\u003c\/strong\u003e compatible with 21700\/20700\/18650\/26650 and more. Ideal for \u003cstrong\u003eelectric vehicles, premium power tools, high-power vaping, tactical flashlights, portable power stations, and industrial energy storage\u003c\/strong\u003e.\u003c\/p\u003e\n\n    \u003ch3\u003eCore Advantages of 21700 Batteries\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSubstantial Capacity Leap:\u003c\/strong\u003e Mainstream capacities of \u003cstrong\u003e4000mAh–5000mAh\u003c\/strong\u003e, with flagship models reaching 5800mAh—a single cell delivers extended runtime for high-drain devices.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eImpressive Power Output:\u003c\/strong\u003e High-drain 21700 cells support \u003cstrong\u003e30A–45A continuous discharge\u003c\/strong\u003e with internal resistance as low as \u003cstrong\u003e8mΩ–15mΩ\u003c\/strong\u003e—ideal for power tools and vaping.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eLower Internal Resistance, Less Heat:\u003c\/strong\u003e Larger electrode area and optimized structure reduce IR, minimizing temperature rise under heavy load for longer cycle life.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eHigher Pack Efficiency:\u003c\/strong\u003e Fewer cells are needed to achieve a given capacity, reducing welding, BMS, and structural costs while improving reliability.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDiverse Chemistries:\u003c\/strong\u003e Available in high-capacity NMC, high-drain INR, protected, and inherently safe LiFePO₄ formulations.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eCore Advantages of 21700 Dedicated Chargers\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePrecision Charging Management:\u003c\/strong\u003e CC\/CV profile with automatic battery type detection (Li-ion\/LiFePO₄) and auto-termination to prevent overcharging.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMultiple Safety Protections:\u003c\/strong\u003e Built-in overcharge, over-discharge, overcurrent, short-circuit, reverse polarity, and overheat protection.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWide Size Compatibility:\u003c\/strong\u003e Supports 21700, 20700, 18650, 26650, 18500, and more—one charger for multiple formats.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eIndependent Charging Channels:\u003c\/strong\u003e Multi-bay chargers control each slot independently—mix cells of different charge levels and sizes.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eLCD Digital Display:\u003c\/strong\u003e Real-time monitoring of voltage, current, charged capacity, and internal resistance.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFast Charging Support:\u003c\/strong\u003e Select models support 2A–3A fast charging for significantly reduced wait times.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003e21700 vs. 18650 vs. 20700 – Key Comparison\u003c\/h3\u003e\n    \u003ctable style=\"border-collapse: collapse; width: 100%; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eParameter\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e21700\u003c\/strong\u003e\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e18650\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e20700\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21mm × 70mm\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e18mm × 65mm\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e20mm × 70mm\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eTypical Capacity Range\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh – 5800mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e1500mAh – 3500mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh – 4250mAh\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eHigh-Drain Continuous Discharge\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e30A – 45A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e20A – 35A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e30A – 40A\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eInternal Resistance (Power Cells)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e8mΩ – 12mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e10mΩ – 15mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e8mΩ – 15mΩ\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eKey Strengths\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHighest energy density, future mainstream\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHighest standardization, lowest cost\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eBalanced size, transitional\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEVs, premium tools, energy storage\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eUniversal across all categories\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003ePower tools, vaping, flashlights\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003ePopular 21700 Battery \u0026amp; Charger Models – Quick Reference\u003c\/h3\u003e\n    \u003ctable style=\"border-collapse: collapse; width: 100%; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eCategory\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eModel\/Spec\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eFeatures\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e21700 Battery\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eINR21700-50E\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e5000mAh \/ 10A, high-capacity benchmark for flashlights\/storage\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e21700 Battery\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eINR21700-50S\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e5000mAh \/ 25A, balanced high capacity and high drain\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e21700 Battery\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eINR21700-40T\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4000mAh \/ 35A, high-drain for power tools\/vaping\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e21700 Battery\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eMolicel P45B\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4500mAh \/ 45A, ultra-high-drain benchmark for professional tools\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e21700 Battery\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eIFR21700-30E\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh \/ 10A, LiFePO₄ for solar\/medical\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e2-Bay Charger\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eXTAR VC2\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSupports 21700\/18650\/26650, LCD display\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e4-Bay Charger\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eNitecore D4\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eIndependent channels, auto-detection\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e4-Bay Fast Charger\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eXTAR VC4S\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3A fast charging, multi-size support, Type-C input\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eTypical Specifications Range (21700 Battery \u0026amp; Charger)\u003c\/h3\u003e\n    \u003ctable style=\"border-collapse: collapse; width: 100%; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eParameter\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700 Battery\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eCompatible Charger\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3.2V (LiFePO₄) \/ 3.6V–3.7V (NMC)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eAuto-detection\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eCapacity Range\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh – 5800mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e—\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eContinuous Discharge\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e10A – 45A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e—\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e—\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eUSB 5V \/ DC 12V\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eCharge Current\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e—\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e0.25A – 3A (adjustable\/adaptive)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003eSize Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21mm × 70mm\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700\/20700\/18650\/26650 and more\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eTypical Applications\u003c\/h3\u003e\n    \u003ctable style=\"border-collapse: collapse; width: 100%; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eApplication\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eRecommended Combo\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEV \/ E-bike battery packs\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700 high-capacity pack + professional multi-series charging\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003ePremium power tools (drills, saws, grinders)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700 high-drain cell + 4-bay fast charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHigh-power vaping \/ box mods\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700 high-drain cell + 2-bay LCD charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eTactical flashlights \/ searchlights\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700 high-capacity cell + 2-bay LCD charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003ePortable power stations\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e21700 high-capacity cell + multi-bay charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eMedical devices \/ industrial instruments\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eIFR21700 LiFePO₄ + LiFePO₄-compatible charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSolar street lights \/ off-grid storage\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eIFR21700 LiFePO₄ + 4-bay charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eHow to Choose the Right 21700 Battery \u0026amp; Charger?\u003c\/h3\u003e\n    \u003ctable style=\"border-collapse: collapse; width: 100%; border: 1px solid #e0e0e0; margin-bottom: 20px;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background-color: #f8f9fa;\"\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eYour Requirement\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eRecommended Battery Type\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eRecommended Charger\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eI need maximum runtime for flashlights or storage\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHigh-Capacity (5000mAh+)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2\/4-bay LCD charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eI need high power output for tools or vaping\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHigh-Drain (25A–45A)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4-bay fast charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eI need both capacity and power\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eBalanced (e.g., 50S, P45B)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4-bay digital charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSafety is critical (solar\/medical)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eLiFePO₄ (IFR21700)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eCharger with LiFePO₄ mode\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eI need to charge multiple different cell types\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e—\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eMulti-bay independent channel charger\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eI need bulk quantities or custom packs\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eContact our sales team\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e—\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003e⚠️ 21700 Battery \u0026amp; Charger Safety Guidelines\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eVoltage Platform Awareness:\u003c\/strong\u003e 3.2V LiFePO₄ and 3.7V NMC cells \u003cstrong\u003ecannot be mixed or charged with the same settings\u003c\/strong\u003e. Ensure the charger is set to the correct mode.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDimensional Compatibility:\u003c\/strong\u003e 21700 cells are larger in diameter and length than 18650. Verify your device supports 21mm diameter × 70mm length.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eUse a Quality Charger:\u003c\/strong\u003e Always use a reliable charger designed for Li-ion or LiFePO₄ chemistry.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAvoid Over-Discharge:\u003c\/strong\u003e Stop discharging when voltage drops below 2.5V–2.8V (NMC) or 2.0V–2.5V (LiFePO₄). Recharge promptly.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAvoid Short Circuits and High Temperatures:\u003c\/strong\u003e Do not short the terminals. Keep away from fire, heat, and moisture.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDiscontinue if Damaged:\u003c\/strong\u003e Stop using cells with torn wraps, dents, or leakage. Recycle responsibly.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eWhy Choose Our 21700 Battery \u0026amp; Charger Collection?\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eGenuine Grade-A Cells:\u003c\/strong\u003e Batteries from Samsung, LG, Molicel, Panasonic, EVE, and other Tier-1 manufacturers. Chargers from XTAR, Nitecore, and professional brands.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFully Tested \u0026amp; Matched:\u003c\/strong\u003e Every battery batch undergoes capacity grading, IR testing, and voltage sorting. Industrial-grade matching available.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eOne-Stop Shopping:\u003c\/strong\u003e Cells, chargers, and accessories all in one place.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFlexible Purchasing:\u003c\/strong\u003e Single-cell retail, multi-pack discounts, tiered bulk pricing, and custom pack assembly.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCertified \u0026amp; Documented:\u003c\/strong\u003e UN38.3, MSDS, CE, RoHS documentation provided.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eExpert Technical Support:\u003c\/strong\u003e Guidance on cell selection, charger matching, and after-sales service.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003e👇👇👇 Browse the product list below to find the perfect \u003cstrong\u003e21700 Battery \u0026amp; Charger\u003c\/strong\u003e combo for your application. For volume quotes or custom pack solutions, please contact our engineering team.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e","products":[{"product_id":"xtar-21700-5000mah-rechargeable-battery-and-lcd-charger3-7volt-high-capacity21700-battery-for-strong-flashlight-and-other-electronic-devices-button-top-batter-ef-bf-b5ycharger","title":"XTAR VC4 Plus Smart Charger with 21700 4900mAh 10A High-Capacity Li-ion Battery Bundle | 3A Fast Charging for Intercoms, Flashlights, and Drones","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Description\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eThis bundle pairs the premium XTAR VC4 Plus 4-slot smart charger with high-capacity XTAR 21700 4900mAh rechargeable lithium-ion batteries. (Available in 1-Pack or 2-Pack options). The included 21700 battery delivers a massive 4900mAh capacity with a 3.6V nominal voltage and supports a robust 10A maximum continuous discharge current. The VC4 Plus charger is universally compatible with a vast array of cylindrical batteries (from 10440 up to 32650) and offers an intuitive LCD display, QC3.0 3A fast charging, 0V battery activation, and a precise 4.20V ± 0.05V charging cutoff. This versatile kit serves as a reliable power solution for a wide range of devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMassive Battery Capacity: The XTAR 21700 battery features an impressive 4900mAh capacity with a 3.6V rated voltage, providing exceptional runtime for high-drain applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRobust Power Output: Supports a maximum continuous discharge current of 10A, delivering consistent and stable power for heavy-duty electronics.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eExtensive Charging Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The VC4 Plus charger supports 3.6V\/3.7V Li-ion batteries (10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650) and 1.2V Ni-MH\/Ni-CD batteries (AAA, AA, A, SC, C).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003ePrecision Charger Performance: Offers up to 3A single-slot fast charging (requires QC3.0 adapter), an LCD screen for real-time capacity, current, and voltage monitoring, and an ultra-precise 4.20V ± 0.05V charging cut-off voltage for Li-ion.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eProfessional Battery Care Functions: Features 0V activation to recover over-discharged batteries, a Capacity Test mode, and a Storage mode to automatically maintain the battery at its optimal 3.7V long-term storage voltage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWide Application Compatibility: Ideal for intercoms, high-lumen flashlights, portable speakers, radios, RC aircraft, camcorders, microphones, power banks, and custom battery packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Parameters\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCharger (XTAR VC4 Plus):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eInput: QC3.0 USB Type-C (9V⎓2A, 18W Max)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Current: Single slot 3A Max \/ Dual slot 2A Max \/ Four slot 1A or 0.5A Max (per slot)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.20V ± 0.05V (Li-ion)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Current: ≤120mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eOperating Temperature: 0 - 40°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: L156 x W115.5 x H35 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCompatible Battery Types\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: 3.6V \/ 3.7V Li-ion (IMR\/INR\/ICR), 1.2V Ni-MH \/ Ni-CD\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCompatible Battery Sizes (Li-ion)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650 (Flat Top)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCompatible Battery Sizes (Ni-MH)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: AAA, AA, A, SC, C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBattery (XTAR 21700 4900mAh):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBrand: XTAR\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eModel: 21700 Rechargeable Li-ion Battery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Capacity: 4900mAh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Voltage: 3.6V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge Current: 10A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWeight: 71g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: 21.4 ± 0.3mm (Diameter) x 74.8 ± 0.5mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003eNote: Manual measurement may have an error margin of 0.5mm.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eIntercoms, two-way radios, portable speakers, and radios.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eHigh-lumen tactical flashlights and EDC lighting equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRemote-controlled aircraft (RC drones and model airplanes).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDigital camcorders, professional video cameras, and wireless microphones.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMobile power banks and custom battery pack assemblies.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eFrequently Asked Questions (FAQ)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ1: What is included in this bundle?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: The bundle includes one XTAR VC4 Plus 4-slot smart charger, one USB Type-C cable, and either 1 or 2 units of the XTAR 21700 4900mAh 10A batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ2: Is this 21700 battery compatible with the VC4 Plus charger?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: Yes, the VC4 Plus features extra-wide slots designed specifically to accommodate larger batteries like 21700 (21.4mm x 74.8mm) safely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ3: What does the 10A discharge current mean for my applications?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: A 10A max discharge current means this battery can safely power devices that require high and sustained current, such as high-lumen flashlights and powerful RC motors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ4: What is the purpose of the charger's \"Storage Mode\"?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: The Storage Mode will automatically charge or discharge the battery to its optimal long-term storage voltage of 3.7V, significantly slowing down capacity degradation over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ5: How does the charger prevent overcharging?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: The XTAR VC4 Plus has an ultra-precise charging cutoff voltage of 4.20V ± 0.05V. Once the battery reaches this level, the charger automatically stops supplying power.\u003c\/span\u003e\u003c\/p\u003e","brand":"XTAR","offers":[{"title":"1 Pack Button Top Batter￵y+Charger","offer_id":51454130553078,"sku":"OAS226","price":48.98,"currency_code":"USD","in_stock":true},{"title":"2 Pack Button Top Batter￵y+Charger","offer_id":51454130585846,"sku":"OAS227","price":62.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-21700-5000mAh-button-top-lcd-combo-main-1_18449ec9-e5c2-49e0-88d3-280ed0a3458c.webp?v=1786965432"},{"product_id":"xtar-vc4sl-21700-5000mah-rechargeable-battery-and-lcd-charger-3a-fast-charging-3-7volt-high-capacity21700-battery-for-strong-flashlight-and-other-electronic-devices","title":"XTAR VC4SL Smart Charger with 21700 4900mAh 10A Battery Bundle | 3A Fast Charging with Capacity Grading \u0026 IR Test for Flashlights and Drones","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Description\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eThis bundle combines the advanced XTAR VC4SL 4-slot smart battery charger with high-capacity XTAR 21700 4900mAh 10A lithium-ion rechargeable batteries. (Available in 1-Pack or 2-Pack options). The included 21700 battery delivers a massive 4900mAh capacity with a 3.6V rated voltage and supports a robust 10A maximum continuous discharge current, making it an excellent choice for high-drain devices. The VC4SL charger offers not only QC3.0 3A fast charging via Type-C, but also professional testing features such as Capacity Grading to measure true mAh, Internal Resistance testing to detect aging cells, and a Storage mode to automatically maintain batteries at their optimal 3.7V storage voltage. This kit provides a comprehensive, intelligent, and safe power solution for your electronic gear.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eComplete High-Performance Kit: Includes one XTAR VC4SL 4-slot smart charger (with Type-C cable \u0026amp; storage pouch) and one or two XTAR 21700 4900mAh 10A batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMassive Battery Capacity: The battery provides 4900mAh capacity, a 3.6V nominal voltage, a 4.2V charging cut-off voltage, and supports a 10A maximum continuous discharge current, ensuring long-lasting and stable power.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eFast QC3.0 Charging: The VC4SL features a Type-C input supporting 9V (QC3.0) power, allowing for an ultra-fast 3A single-slot charging current. Currents can be adjusted to 2A for dual slots, and 1A\/0.5A\/0.25A for four-slot charging based on needs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAdvanced Battery Diagnostics: Equipped with a clear LCD screen, it offers a Capacity Grading mode to reveal the true capacity (mAh) via a charge-discharge-charge cycle, and an accurate Internal Resistance (IR) test to identify aging or damaged batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eIntelligent Storage Mode: The charger's Storage Mode will automatically charge or discharge the battery to the optimal long-term storage voltage (3.7V for Li-ion, 1.2V for Ni-MH), significantly slowing down capacity degradation over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWide Compatibility \u0026amp; Precision Voltage: The VC4SL's spring-loaded slots support a vast array of 3.6V\/3.7V Li-ion batteries (10440 to 32650) and 1.2V Ni-MH\/Ni-CD batteries. It features a highly precise charging cut-off voltage of 4.20V ± 0.05V for Li-ion to ensure safe and full charging without damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Parameters\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCharger (XTAR VC4SL):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eInput Power: QC3.0 Type-C (9V\/2A, Max 18W)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eConstant Charging Current: 3Ax1 \/ 2Ax2 \/ 1Ax4 \/ 0.5Ax4 \/ 0.25Ax4\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.20V ± 0.05V (Li-ion) \/ 1.45V ± 0.1V (Ni-MH)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Current: ≤120mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eOptimal Storage Voltage: 3.7V (Li-ion), 1.2V (Ni-MH)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eOperating Temperature: 0°C - 40°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: L156 x W115 x H35 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNet Weight: 212g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Battery Types: 3.6V\/3.7V Li-ion (IMR\/INR\/ICR), 1.2V Ni-MH\/Ni-CD\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Li-ion Sizes: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650 (Flat Top)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Ni-MH Sizes: AAA, AA, A, SC, C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBattery (XTAR 21700 4900mAh):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBrand: XTAR\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eModel: 21700 Rechargeable Li-ion Battery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Capacity: 4900mAh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Voltage: 3.6V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge Current: 10A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWeight: 71g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: 21.4 ± 0.3mm (Diameter) x 74.8 ± 0.5mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003eNote: Manual measurement may have an error margin of 0.5mm.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eProvides long-lasting power for high-lumen tactical flashlights and EDC searchlights.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eProfessional battery grading and power management for RC drones and model aircraft.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eReliable energy for portable radios, intercoms, and outdoor communication equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBackup power supply for emergency kits, power banks, and outdoor camping gear.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eFrequently Asked Questions (FAQ)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ1: What is included in this bundle?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: This bundle includes one XTAR VC4SL 4-slot smart charger, one Type-C fast charging cable, one user manual, one travel storage pouch, and either 1 or 2 units of the XTAR 21700 4900mAh 10A batteries based on your selection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ2: Is the 21700 4900mAh battery compatible with the VC4SL charger?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: Yes. The VC4SL features a flexible spring-loaded slot design that is specifically engineered to accommodate protected 21700 batteries (21.4mm x 74.8mm) safely and securely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ3: What does the 10A discharge current mean for my devices?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: The 10A maximum continuous discharge current ensures the battery can safely deliver high power to devices requiring high drain, like powerful flashlights and drone motors, without overheating or voltage sag.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ4: What are the actual voltage parameters of the charging cut-off?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: The VC4SL uses a highly precise charging cut-off voltage of 4.20V ± 0.05V for 3.6V\/3.7V lithium-ion batteries and 1.45V ± 0.1V for 1.2V Ni-MH batteries, ensuring full charge without overcharging risks. The Storage mode will maintain a safe voltage of 3.7V for this 21700 battery.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ5: How do I achieve the maximum 3A charging speed?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: To reach 3A fast charging, you must use a QC3.0 (9V\/2A) power adapter, insert a battery into a single slot, and do not insert any other batteries into the charger. The charger will automatically detect the input voltage and regulate the optimal current.\u003c\/span\u003e\u003c\/p\u003e","brand":"XTAR","offers":[{"title":"1 Pack 21700 Button Top Battery+LCD Charger","offer_id":51454131142902,"sku":"OAS238","price":52.98,"currency_code":"USD","in_stock":true},{"title":"2 Packs 21700 Button Top Battery+LCD Charger","offer_id":51454131175670,"sku":"OAS239","price":79.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc4sl-21700-5000mah-charger-kit-main-product-1_49f3c7a6-b457-4bf1-849c-bfe662b1ceeb.webp?v=1786965459"},{"product_id":"xtar-21700-rechargeable-battery-with-3a-lcd-battery-charger-3-7volt-button-top-5000mah-high-capacity-for-flashlight-headlamp21700-batterycharger","title":"XTAR VC8 8-Bay Smart Charger with 21700 4900mAh 10A Battery Bundle | 3A Fast Charge \u0026 Capacity Grading Kit for Drones","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Description\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eThis bundle combines the flagship XTAR VC8 8-slot professional-grade smart charger with high-capacity XTAR 21700 4900mAh 10A lithium-ion rechargeable batteries. (Available in 1-Pack or 2-Pack options). The included 21700 battery delivers an impressive 4900mAh true capacity, a 3.6V nominal voltage, and a robust 10A maximum continuous discharge current, making it an ideal powerhouse for high-drain consumer electronics. The XTAR VC8 charger offers eight independent charging circuits, dual high-definition VA LCD screens, and a powerful 3A fast charging mode. It goes far beyond basic charging with professional features: Capacity Grading to measure true mAh, Internal Resistance testing, and an intelligent Storage mode that automatically maintains the optimal 3.7V long-term voltage. This kit provides the ultimate professional power management and health diagnostic solution for enthusiasts and professionals.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eComplete High-Capacity Power Kit: Includes one XTAR VC8 8-slot smart charger (with USB cable) and one or two XTAR 21700 4900mAh 10A batteries based on your selection.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eHigh-Capacity Battery Specifications: Features 4900mAh true capacity, a 3.6V nominal voltage, a 4.2V charging cut-off, and a 10A max continuous discharge current. The battery weighs 71g and measures 21.4mm in diameter and 74.8mm in height.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e8 Fully Independent Charging Slots: Each slot features independent circuit control, allowing you to charge various battery types (Li-ion and Ni-MH) without mutual interference. Designed with extended slots to safely accommodate protected 21700 batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e3A Ultra-Fast Charging: Equipped with a QC3.0 Type-C input, providing a maximum 3A charging current when a single battery is placed in slot CH1 or CH8, drastically reducing downtime.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDual VA LCD Screens \u0026amp; Advanced Diagnostics: High-contrast dual screens display real-time voltage, current, capacity (mAh), and internal resistance. The Capacity Grading mode (supported in CH1-CH4) runs a full charge-discharge-charge cycle to reveal true battery health.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eIntelligent Storage Mode \u0026amp; 0V Activation: Automatically charges or discharges batteries to the optimal long-term storage voltage of 3.7V for Li-ion batteries to prevent capacity loss. The 0V activation feature safely revives over-discharged batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAdjustable Charging Currents: Offers four manual current gears: 250mA, 500mA (8 slots), 1000mA (4 slots), and 2000mA (Slots CH1\/CH8).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eComprehensive Safety Protections: Built-in over-voltage, over-current, short-circuit, reverse polarity, and over-charge protection, paired with an intelligent temperature control system.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Parameters\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCharger (XTAR VC8):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eModel: XTAR VC8\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eInput Power: QC3.0 Type-C (5V⎓2A \/ 9V⎓2A)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAdjustable Charging Current: 3A x 1 \/ 2A x 2 \/ 1A x 4 \/ 0.5A x 8 \/ 0.25A x 8\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.20 ± 0.05V (Li-ion) \/ 1.45 ± 0.1V (Ni-MH)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Current: ≤120mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eOperating Temperature: 0 - 40°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: L194mm x W134mm x H34mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNet Weight: 350g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Li-ion Sizes: 10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 (Supports protected 20700 \u0026amp; 21700)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBattery (XTAR 21700 4900mAh):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBrand: XTAR\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eModel: 21700 Rechargeable Li-ion Battery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Capacity: 4900mAh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Voltage: 3.6V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge Current: 10A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWeight: 71g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: 21.4 ± 0.3mm (Diameter) x 74.8 ± 0.5mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003eNote: Manual measurement has an error margin of 0.5mm.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eProfessional battery capacity grading and long-term storage management.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eHigh-efficiency multi-slot charging for 21700 cells used in high-lumen EDC tactical flashlights and searchlights.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAdvanced battery diagnostics for RC drone batteries, including IR testing and accurate capacity sorting.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBattery screening, pairing, and maintenance for DIY power bank builders and custom battery pack assemblers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eReliable power management for outdoor survival gear and emergency backup systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eFrequently Asked Questions (FAQ)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ1: What is included in this bundle?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: The bundle includes one XTAR VC8 8-slot smart charger, one USB-A to USB-C charging cable, one user manual, and either 1 or 2 units of the XTAR 21700 4900mAh 10A batteries based on your selected variant.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ2: Can the VC8 accommodate protected 21700 batteries?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: Yes. The XTAR VC8 features wide, extended slots that are specifically designed to safely and securely accommodate protected 20700 and 21700 batteries, including the 21.4mm diameter and 74.8mm height of this model.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ3: How do I achieve the maximum 3A fast charging speed with the VC8?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: To achieve 3A fast charging, you must use a QC3.0 (9V\/2A) power adapter and charge a single battery exclusively in slot CH1 or CH8. The charger will automatically detect the input and adjust the current accordingly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ4: How does the \"Capacity Grading\" mode work for this 21700 battery?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: Capacity Grading mode (supported in CH1 to CH4) runs a complete charge-discharge-charge cycle. This accurately measures the true capacity of the 4900mAh cell, allowing you to easily identify if the battery is genuine, healthy, or has aged.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ5: What is the purpose of the \"Storage Mode\" for Li-ion batteries?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: If you do not plan to use this 3.6V 21700 battery for an extended period, the Storage Mode will automatically charge or discharge it to the optimal long-term storage voltage of 3.7V. This significantly slows down capacity degradation and maximizes the battery's overall lifespan.\u003c\/span\u003e\u003c\/p\u003e","brand":"XTAR","offers":[{"title":"1 Pack 21700 Battery+Charger","offer_id":51454141497590,"sku":"OAS294","price":79.98,"currency_code":"USD","in_stock":true},{"title":"2 Packs 21700 Battery+Charger","offer_id":51454141530358,"sku":"OAS295","price":95.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-3a-lcd-charger-5000mah-21700-kit-main-1_33124f20-b4bc-4785-ac40-496d3327963a.webp?v=1786965641"},{"product_id":"xtar-21700-5000mah-rechargeable-battery-and-2-bay-lcd-display-2a-smart-universal-charger3-7volt-button-top-high-capacity-battery-for-strong-flashlight-and-other-electronic-devices","title":"XTAR VC2L Smart Charger with 21700 4900mAh 10A Button Top Battery Bundle | 2A Fast Charge with Color VA LCD for High-Power Drones","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Description\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eThis bundle pairs the upgraded XTAR VC2L 2-slot smart charger with high-capacity XTAR 21700 4900mAh 10A lithium-ion rechargeable batteries. (Available in 1-Pack or 2-Pack options). The included 21700 battery delivers an impressive 4900mAh true capacity, a 3.6V nominal voltage, and a robust 10A maximum continuous discharge current. \u003c\/span\u003e\u003cspan class=\"\"\u003eIt features a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top positive terminal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, ensuring excellent contact with high-power devices like drones.\u003c\/span\u003e \u003cspan class=\"\"\u003eThe XTAR VC2L charger features an upgraded extendable spring-loaded slot design, specifically engineered to safely accommodate \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eprotected 20700 and 21700 batteries\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e—making it a perfect match for this kit.\u003c\/span\u003e\u003cspan class=\"\"\u003e With a vibrant color VA LCD screen, 2A single-slot fast charging, Type-C input, and 0V activation, this kit provides a highly compatible, informative, and powerful charging solution for your high-drain portable electronics.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eComplete High-Performance Power Kit: Includes one XTAR VC2L upgraded charger (with Type-C cable) and one or two XTAR 21700 4900mAh 10A batteries based on your selection.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eHigh-Capacity Battery Specifications: Features 4900mAh true capacity, a 3.6V nominal voltage, a 4.2V charging cut-off, and a 10A maximum continuous discharge current. \u003c\/span\u003e\u003cspan class=\"\"\u003eIt features a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top positive terminal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, perfectly suitable for and RC drones.\u003c\/span\u003e\u003cspan class=\"\"\u003e Weighing 71g, it measures 21.4mm in diameter and 74.8mm in height.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eUpgraded Extendable Battery Slots: The VC2L features a newly designed spring-loaded bay that securely accommodates this 21700 battery. \u003c\/span\u003e\u003cspan class=\"\"\u003eA key advantage: it safely supports \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eprotected 20700 and 21700 batteries\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, providing superior versatility over many standard chargers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eInnovative Color VA LCD Display: Equipped with a high-contrast color screen using a creative gauge-style interface, it clearly displays real-time battery voltage, charging current gear, charged capacity (mAh), and battery type.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e2A Single-Slot Fast Charging \u0026amp; Type-C Input: Supports adjustable charging currents: 2A for a single slot, 1A for two slots, or 0.5A for two slots. Features a modern Type-C port (5V 2.1A) for easy connection to phone adapters, laptops, or power banks.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eIntelligent Charging \u0026amp; 0V Activation: Automatically identifies battery types and applies TC-CC-CV for Li-ion or 0ΔV\/-ΔV pulse charging for Ni-MH. Built-in 0V activation safely revives over-discharged batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eComprehensive Safety Protection: Built-in over-current, over-voltage, over-charge, short-circuit, and reverse polarity protection (with \"Err\" warnings on the screen), supported by intelligent temperature control.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Parameters\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCharger (XTAR VC2L):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eModel: XTAR VC2L\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eInput Power: DC 5V 2.1A (Type-C)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eConstant Charging Current: 2A x 1 \/ 1A x 2 \/ 0.5A x 2\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.2 ± 0.05V (Li-ion) \/ 1.45 ± 0.1V (Ni-MH)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Current: ≤150mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eOperating Temperature: 0 - 40°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: 136 x 63 x 33 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNet Weight: 115g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Battery Types: 3.6V \/ 3.7V Li-ion (IMR\/INR\/ICR), 1.2V Ni-MH \/ Ni-CD\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Li-ion Sizes: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSupported Ni-MH\/Ni-CD Sizes: AAAA, AAA, AA, A, SC, C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUpgrade Note:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e This charger supports protected 20700 and 21700 batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBattery (XTAR 21700 4900mAh):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBrand: XTAR\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eModel: 21700 Rechargeable Li-ion Battery\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Capacity: 4900mAh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eNominal Voltage: 3.6V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCharging Cut-off Voltage: 4.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge Current: 10A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePositive Terminal: Button Top\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWeight: 71g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDimensions: 21.4 ± 0.3mm (Diameter) x 74.8 ± 0.5mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan class=\"\"\u003eReliable and powerful power source for high-performance RC drones, aircraft models, and robotics.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eLong-lasting energy for high-lumen EDC tactical flashlights and searchlights.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eProfessional battery management for outdoor survival gear and emergency backup systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eA versatile and future-proof charging solution that natively supports protected 21700 cells, offering superior device compatibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eFrequently Asked Questions (FAQ)\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ1: What is included in this bundle?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: The bundle includes one XTAR VC2L smart charger, one Type-C charging cable, one user manual, and either 1 or 2 units of the XTAR 21700 4900mAh 10A \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e batteries based on your selected variant.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ2: Can the VC2L charger accommodate the 21700 battery in this kit?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: Absolutely. The VC2L features an upgraded extendable spring-loaded slot design specifically engineered to safely accommodate this 74.8mm long 21700 battery (including those with protection boards).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ3: How do I switch the charging current on the VC2L?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: Simply click the physical button located just below the LCD display screen to cycle through the three current settings: 2A for a single slot, 1A for two slots, or 0.5A for two slots.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ4: What does the color VA LCD display show?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: The innovative gauge-style display provides real-time, easy-to-read information including battery voltage, charging current gear, charged capacity (mAh), and battery type. If a battery is inserted incorrectly, the screen will clearly display \"Err\".\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eQ5: Can I charge a Li-ion and a Ni-MH battery at the same time?\u003c\/span\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: Yes. The VC2L features completely independent dual-slot circuits, allowing you to safely charge a 3.6V Li-ion battery (like this 21700) in one slot and a 1.2V Ni-MH battery in the other slot simultaneously.\u003c\/span\u003e\u003c\/p\u003e","brand":"XTAR","offers":[{"title":"1 Pack 21700 Battery+Charger","offer_id":51454154080502,"sku":"OAS334","price":33.98,"currency_code":"USD","in_stock":true},{"title":"2 Packs 21700 Battery+Charger","offer_id":51454154113270,"sku":"OAS335","price":47.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-21700-4900mah-2bay-lcd-charger-kit-main-1_daed6dab-f0c2-4326-ae62-d88cd773e643.webp?v=1786965952"},{"product_id":"samsung-inr21700-50e-5000mah-10a-21700-battery-2-pack-with-xtar-mc2-dual-slot-charger-ultra-long-run-power-kit-for-camping-gear-outdoor-photography-emergency-backup","title":"Samsung INR21700-50E 5000mAh 10A 21700 Battery 2-Pack with XTAR MC2 Dual-Slot Charger – Ultra-Long-Run Power Kit for Camping Gear, Outdoor Photography \u0026 Emergency Backup","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;155-173\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:518;175-692\"\u003eThe Samsung 50E is a high-energy 21700 cell built for runtime, not extreme current — a genuine 5000mAh capacity in a moderate-drain package that's a common choice for e-bikes, power tools, and long-runtime battery packs. This bundle pairs 2 genuine Samsung INR21700-50E batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;699-737\"\u003eSamsung INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:115;739-1425\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Rated Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (standard) \/ 4753mAh (rated, 1C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ20.25mm × 70.8mm, max weight 69g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, drones, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:293;1427-1719\"\u003e\u003cem\u003eNote: Samsung's own product positioning specifies the 50E for ESS, power tools, drones, medical devices, robots, and EV applications — and explicitly notes it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards. It's an energy\/runtime cell, not a high-drain one.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1721-1902\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;1909-1933\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-45:64;1935-2604\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:98;1935-2032\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:102;2033-2134\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:145;2135-2279\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:71;2280-2350\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:113;2351-2463\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:77;2464-2540\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:64;2541-2604\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"49:1-49:48;2611-2658\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"51:1-51:219;2660-2878\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the Samsung 50E (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:74;2880-2953\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:23;2960-2982\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:156;2984-3139\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the 50E's 70.8mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-61:371;3141-3511\"\u003e\u003cem\u003eImportant: The 50E supports a standard charge current of 2.45A, but the MC2 charges at a maximum of 0.5A per slot. Charging a 5000mAh cell at 0.5A will take considerably longer than on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary fast charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"65:1-65:19;3518-3536\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"67:1-70:18;3538-3629\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:35;3538-3572\"\u003eSamsung INR21700-50E Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:23;3573-3595\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:16;3596-3611\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:18;3612-3629\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"74:1-74:15;3636-3650\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"76:1-80:50;3652-4163\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:105;3652-3756\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:63;3757-3819\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:70;3820-3889\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:224;3890-4113\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:50;4114-4163\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"84:1-84:7;4170-4176\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"86:1-87:299;4178-4537\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge Samsung 50E batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the 50E, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than the 50E's rated fast-charge current, so a full charge will take longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:253;4539-4856\"\u003e\u003cstrong\u003eQ: Is the Samsung 50E suitable for flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for flashlights, RC cars, or electric skateboards. It's built for e-bikes, power tools, drones, energy storage, and similar runtime-focused applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:128;4858-5038\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the 50E's 70.8mm length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:335;5040-5437\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a 50E on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot and the 50E has a 5000mAh capacity, expect a full charge to take considerably longer than the 50E's rated 2.45A standard charge current would suggest — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:136;5439-5627\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:89;5629-5743\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 Samsung INR21700-50E batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454224859382,"sku":"OAS1779","price":26.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-samsung-50e-flat-top-2pack-camping-kit-main_77eabef4-8e28-468e-8544-fe0864cdbc44.webp?v=1786968720"},{"product_id":"samsung-inr21700-50e-5000mah-10a-21700-battery-4-pack-with-nitecore-ums4-smart-charger-high-capacity-power-kit-with-lcd-control-for-rv-power-off-grid-storage-field-communications","title":"Samsung INR21700-50E 5000mAh 10A 21700 Battery 4-Pack with Nitecore UMS4 Smart Charger – High-Capacity Power Kit with LCD Control for RV Power, Off-Grid Storage \u0026 Field Communications","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;167-185\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:576;187-762\"\u003eThe Samsung 50E is a high-energy 21700 cell built for runtime, not extreme current — a genuine 5000mAh capacity in a moderate-drain package that's a common choice for e-bikes, power tools, and long-runtime battery packs. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine Samsung INR21700-50E batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;769-807\"\u003eSamsung INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:115;809-1495\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Rated Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (standard) \/ 4753mAh (rated, 1C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ20.25mm × 70.8mm, max weight 69g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, drones, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:293;1497-1789\"\u003e\u003cem\u003eNote: Samsung's own product positioning specifies the 50E for ESS, power tools, drones, medical devices, robots, and EV applications — and explicitly notes it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards. It's an energy\/runtime cell, not a high-drain one.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1791-1972\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:30;1979-2008\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:95;2010-3116\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:111;2010-2120\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:109;2121-2229\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:121;2230-2350\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:202;2351-2552\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2553-2668\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:88;2669-2756\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2757-2948\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;2949-3021\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:95;3022-3116\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:53;3123-3175\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:147;3177-3323\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the Samsung 50E (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-56:33;3325-3553\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:68;3555-3622\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"62:1-62:23;3629-3651\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-64:375;3653-4027\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the 50E. Unlike a basic dual-slot travel charger, the UMS4's per-bay output (up to 3,000mA with a QC adapter on a single bay) lines up much more closely with the 50E's 2.45A standard charge current, making full charges considerably faster than a low-current charger would allow.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-66:223;4029-4251\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — still slower than the 50E's max 4.9A rating, but a reasonable, safe charging pace for four cells at once.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:19;4258-4276\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"72:1-75:18;4278-4391\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:35;4278-4312\"\u003eSamsung INR21700-50E Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:34;4313-4346\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:27;4347-4373\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:18;4374-4391\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"79:1-79:15;4398-4412\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"81:1-85:50;4414-4930\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:105;4414-4518\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:63;4519-4581\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:75;4582-4656\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:224;4657-4880\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:50;4881-4930\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"89:1-89:7;4937-4943\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:279;4945-5289\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge Samsung 50E batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50E cells, with real-time monitoring on its LCD display, and its higher per-bay output charges these cells noticeably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:253;5291-5608\"\u003e\u003cstrong\u003eQ: Is the Samsung 50E suitable for  flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for flashlights, RC cars, or electric skateboards. It's built for e-bikes, power tools, drones, energy storage, and similar runtime-focused applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:188;5610-5851\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:122;5853-6028\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50E without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:173;6030-6253\"\u003e\u003cstrong\u003eQ: How do I know if a 50E battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:96;6255-6413\"\u003e\u003cstrong\u003eQ: Can I power the UMS4 with a power bank while traveling?\u003c\/strong\u003e A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:105;6415-6545\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 Samsung INR21700-50E batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":51454224892150,"sku":"OAS1780","price":100.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-samsung-50e-flat-top-4pack-rv-kit-main_98b03a66-198d-403b-a3d2-0b7534a87ee0.webp?v=1786968725"},{"product_id":"samsung-inr21700-50e-5000mah-10a-21700-battery-6-pack-with-nitecore-ums4-ui1-chargers-high-capacity-power-system-for-rv-living-overland-expeditions-off-grid-communication-bases","title":"Samsung INR21700-50E 5000mAh 10A 21700 Battery 6-Pack with Nitecore UMS4 \u0026 Ui1 Chargers – High-Capacity Power System for RV Living, Overland Expeditions \u0026 Off-Grid Communication Bases","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;179-197\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:717;199-915\"\u003eThe Samsung 50E is a high-energy 21700 cell built for runtime, not extreme current — a genuine 5000mAh capacity in a moderate-drain package that's a common choice for e-bikes, power tools, and long-runtime battery packs. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine Samsung INR21700-50E batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;922-960\"\u003eSamsung INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:115;962-1648\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Rated Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (standard) \/ 4753mAh (rated, 1C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ20.25mm × 70.8mm, max weight 69g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, drones, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:293;1650-1942\"\u003e\u003cem\u003eNote: Samsung's own product positioning specifies the 50E for ESS, power tools, drones, medical devices, robots, and EV applications — and explicitly notes it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards. It's an energy\/runtime cell, not a high-drain one.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1944-2125\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:46;2132-2177\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"39:1-39:44;2179-2222\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-46:73;2223-3108\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:179;2223-2401\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the closest match here to the 50E's 2.45A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:76;2402-2477\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:147;2478-2624\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2625-2740\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:103;2741-2843\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2844-3035\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;3036-3108\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"48:1-48:47;3110-3156\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"49:1-53:136;3157-3626\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:126;3157-3282\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:62;3283-3344\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:83;3345-3427\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:63;3428-3490\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:136;3491-3626\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:37;3633-3669\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-62:56;3671-4117\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the Samsung 50E (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-66:55;4119-4499\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the Samsung 50E (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:23;4506-4528\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"72:1-72:524;4530-5053\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50E without any adapter, and the UI1's slot fits the same length range. Since the 50E has a relatively large 5000mAh capacity, charging speed does matter here: the UMS4 (up to 3,000mA on a single occupied bay) will get closer to the 50E's 2.45A rated charge current than the UI1 (up to 1,000mA), so we'd suggest running your most time-sensitive cells through the UMS4 and using the UI1 for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"76:1-76:19;5060-5078\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"78:1-82:19;5080-5234\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:35;5080-5114\"\u003eSamsung INR21700-50E Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:34;5115-5148\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:39;5149-5187\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:28;5188-5215\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:19;5216-5234\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"86:1-86:15;5241-5255\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"88:1-92:50;5257-5780\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"88:1-88:105;5257-5361\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:63;5362-5424\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:82;5425-5506\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:224;5507-5730\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"92:1-92:50;5731-5780\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"96:1-96:7;5787-5793\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:207;5795-6055\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:253;6057-6374\"\u003e\u003cstrong\u003eQ: Is the Samsung 50E suitable for  flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for flashlights, RC cars, or electric skateboards. It's built for e-bikes, power tools, drones, energy storage, and similar runtime-focused applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:101;6376-6526\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the 50E without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:402;6528-6999\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge — with a 5000mAh cell like the 50E, it will take noticeably longer to fill on the UI1 than on the UMS4.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:173;7001-7221\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"113:1-114:147;7223-7395\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 Samsung INR21700-50E batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":51454224924918,"sku":"OAS1781","price":125.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-samsung-50e-flat-top-6pack-overland-kit-main_9182cf74-7dda-46cc-b15a-5c7f7baa9690.webp?v=1786968727"},{"product_id":"samsung-inr21700-50s-5000mah-20a-21700-battery-2-pack-with-xtar-mc2-dual-slot-charger-reliable-high-power-kit-for-tactical-gear-heavy-duty-tools-high-torque-e-mobility","title":"Samsung INR21700-50S 5000mAh 20A 21700 Battery 2-Pack with XTAR MC2 Dual-Slot Charger – Reliable High-Power Kit for Tactical Gear, Heavy-Duty Tools \u0026 High-Torque E-Mobility","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;171-189\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:615;191-805\"\u003eThe Samsung 50S steps up from the 50E with the same 5000mAh capacity but a significantly higher discharge ceiling — 20A continuous without a temperature cutoff, or up to 35A with an 80°C thermal cutoff — making it a stronger choice for e-bikes, power tools, and drones that need both energy and real current delivery. This bundle pairs 2 genuine Samsung INR21700-50S batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;812-850\"\u003eSamsung INR21700-50S Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:120;852-1544\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50S (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20A (no temp cutoff) \/ 35A (80°C temp cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRapid Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e6A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, high-capacity\/high-discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.25mm × 70.6mm, max weight 72g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVs, e-bikes, drones, power tools, e-mobility, and other high-capacity high-drain battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:226;1546-1771\"\u003e\u003cem\u003eNote: Samsung's own product positioning lists the 50S for EV, e-bike, drone, power tool, and e-mobility applications, and explicitly states it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1773-1954\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;1961-1985\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-45:64;1987-2656\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:98;1987-2084\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:102;2085-2186\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:145;2187-2331\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:71;2332-2402\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:113;2403-2515\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:77;2516-2592\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:64;2593-2656\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"49:1-49:48;2663-2710\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"51:1-51:219;2712-2930\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the Samsung 50S (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:74;2932-3005\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:23;3012-3034\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:156;3036-3191\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the 50S's 70.6mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-61:397;3193-3589\"\u003e\u003cem\u003eImportant: The 50S supports a standard charge current of 2.5A (up to 6A on rapid charge), but the MC2 charges at a maximum of 0.5A per slot. Charging a 5000mAh cell at 0.5A will take considerably longer than on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary fast charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"65:1-65:19;3596-3614\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"67:1-70:18;3616-3707\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:35;3616-3650\"\u003eSamsung INR21700-50S Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:23;3651-3673\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:16;3674-3689\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:18;3690-3707\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"74:1-74:15;3714-3728\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"76:1-80:50;3730-4228\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:105;3730-3834\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:63;3835-3897\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:70;3898-3967\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:211;3968-4178\"\u003eThe 50S is an unprotected cell intended for compatible, purpose-built devices such as EVs, e-bikes, drones, and power tools — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:50;4179-4228\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"84:1-84:7;4235-4241\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"86:1-87:294;4243-4597\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge Samsung 50S batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the 50S, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than the 50S's rated charge current, so a full charge will take longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:229;4599-4892\"\u003e\u003cstrong\u003eQ: Is the Samsung 50S suitable for flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for  flashlights, RC cars, or electric skateboards. It's built for EVs, e-bikes, drones, power tools, and e-mobility applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:259;4894-5196\"\u003e\u003cstrong\u003eQ: How does the 50S compare to the 50E?\u003c\/strong\u003e A: Both share the same 5000mAh capacity, but the 50S has a meaningfully higher discharge ceiling — 20A continuous (35A with thermal cutoff) versus the 50E's 9.8A — making the 50S the better pick for applications that need more current alongside the capacity.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:128;5198-5378\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the 50S's 70.6mm length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:320;5380-5762\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a 50S on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot and the 50S has a 5000mAh capacity, expect a full charge to take considerably longer than the 50S's rated charge current would suggest — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:136;5764-5952\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:89;5954-6068\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 Samsung INR21700-50S batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454224990454,"sku":"OAS1783","price":28.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-samsung-50s-flat-top-2pack-tactical-kit-main_74cf9cbf-746e-4e50-b0e3-cdaaa0428147.webp?v=1786968731"},{"product_id":"samsung-inr21700-50e-5000mah-10a-21700-battery-8-pack-with-xtar-vc8-8-slot-lcd-charger-high-capacity-power-reserve-for-home-emergency-backup-rv-fleet-logistics-outdoor-production-studios","title":"Samsung INR21700-50E 5000mAh 10A 21700 Battery 8-Pack with XTAR VC8 8-Slot LCD Charger – High-Capacity Power Reserve for Home Emergency Backup, RV Fleet Logistics \u0026 Outdoor Production Studios","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;163-181\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:570;183-752\"\u003eThe Samsung 50E is a high-energy 21700 cell built for runtime, not extreme current — a genuine 5000mAh capacity in a moderate-drain package that's a common choice for e-bikes, power tools, and long-runtime battery packs. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Samsung INR21700-50E batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;759-797\"\u003eSamsung INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:115;799-1485\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Rated Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (standard) \/ 4753mAh (rated, 1C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ20.25mm × 70.8mm, max weight 69g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, drones, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:293;1487-1779\"\u003e\u003cem\u003eNote: Samsung's own product positioning specifies the 50E for ESS, power tools, drones, medical devices, robots, and EV applications — and explicitly notes it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards. It's an energy\/runtime cell, not a high-drain one.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1781-1962\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;1969-1993\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:139;1995-3291\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:170;1995-2164\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the closest match here to the 50E's 2.45A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:124;2165-2288\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:81;2289-2369\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:216;2370-2585\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:112;2586-2697\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:115;2698-2812\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:127;2813-2939\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:213;2940-3152\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:139;3153-3291\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:48;3298-3345\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:110;3347-3456\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the Samsung 50E (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:111;3458-3568\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:77;3570-3646\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:102;3648-3749\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"63:1-63:23;3756-3778\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:557;3780-4336\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the 50E's 70.8mm length. Since the 50E has a relatively large 5000mAh capacity, charging speed matters here: with all 8 slots occupied, the VC8 defaults to a gentler 0.5A per slot, which will take a while to fully charge a set of 5000mAh cells. If you're in a hurry, manually selecting the higher current levels (up to 3A on a single slot) will get individual cells closer to the 50E's rated charge speed, at the cost of fewer slots charging simultaneously.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:19;4343-4361\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"71:1-74:18;4363-4474\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:35;4363-4397\"\u003eSamsung INR21700-50E Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:23;4398-4420\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:36;4421-4456\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4457-4474\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:15;4481-4495\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:50;4497-5008\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4497-4601\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:63;4602-4664\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:70;4665-4734\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:224;4735-4958\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;4959-5008\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:7;5015-5021\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:182;5023-5265\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge Samsung 50E batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50E cells, with independent monitoring on each of its 8 slots.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:253;5267-5584\"\u003e\u003cstrong\u003eQ: Is the Samsung 50E suitable for flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for  flashlights, RC cars, or electric skateboards. It's built for e-bikes, power tools, drones, energy storage, and similar runtime-focused applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:114;5586-5752\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the 50E's 70.8mm length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:222;5754-6029\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:175;6031-6262\"\u003e\u003cstrong\u003eQ: How do I test if a 50E battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:139;6264-6473\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:109;6475-6609\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 Samsung INR21700-50E batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454225023222,"sku":"OAS1782","price":123.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-samsung-50e-flat-top-8pack-reserve-main_3098ca58-7c3a-4900-980e-2165b276d8af.webp?v=1786968730"},{"product_id":"samsung-inr21700-50s-5000mah-20a-21700-battery-4-pack-with-nitecore-ums4-smart-charger-reliable-high-power-kit-for-tactical-gear-heavy-duty-tools-high-torque-e-mobility","title":"Samsung INR21700-50S 5000mAh 20A 21700 Battery 4-Pack with Nitecore UMS4 Smart Charger – Reliable High-Power Kit for Tactical Gear, Heavy-Duty Tools \u0026 High-Torque E-Mobility","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;183-201\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:673;203-875\"\u003eThe Samsung 50S steps up from the 50E with the same 5000mAh capacity but a significantly higher discharge ceiling — 20A continuous without a temperature cutoff, or up to 35A with an 80°C thermal cutoff — making it a stronger choice for e-bikes, power tools, and drones that need both energy and real current delivery. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine Samsung INR21700-50S batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;882-920\"\u003eSamsung INR21700-50S Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:120;922-1614\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50S (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20A (no temp cutoff) \/ 35A (80°C temp cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRapid Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e6A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, high-capacity\/high-discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.25mm × 70.6mm, max weight 72g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVs, e-bikes, drones, power tools, e-mobility, and other high-capacity high-drain battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:226;1616-1841\"\u003e\u003cem\u003eNote: Samsung's own product positioning lists the 50S for EV, e-bike, drone, power tool, and e-mobility applications, and explicitly states it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1843-2024\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:30;2031-2060\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:95;2062-3235\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:178;2062-2239\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — the closest match here to the 50S's 2.5A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:109;2240-2348\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:121;2349-2469\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:202;2470-2671\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2672-2787\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:88;2788-2875\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2876-3067\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;3068-3140\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:95;3141-3235\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:53;3242-3294\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:147;3296-3442\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the Samsung 50S (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-56:33;3444-3672\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:68;3674-3741\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"62:1-62:23;3748-3770\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-64:374;3772-4145\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the 50S. Unlike a basic dual-slot travel charger, the UMS4's per-bay output (up to 3,000mA with a QC adapter on a single bay) lines up much more closely with the 50S's 2.5A standard charge current, making full charges considerably faster than a low-current charger would allow.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-66:221;4147-4367\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — slower than the 50S's rapid-charge rating, but a reasonable, safe charging pace for four cells at once.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:19;4374-4392\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"72:1-75:18;4394-4507\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:35;4394-4428\"\u003eSamsung INR21700-50S Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:34;4429-4462\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:27;4463-4489\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:18;4490-4507\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"79:1-79:15;4514-4528\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"81:1-85:50;4530-5033\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:105;4530-4634\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:63;4635-4697\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:75;4698-4772\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:211;4773-4983\"\u003eThe 50S is an unprotected cell intended for compatible, purpose-built devices such as EVs, e-bikes, drones, and power tools — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:50;4984-5033\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"89:1-89:7;5040-5046\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:279;5048-5392\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge Samsung 50S batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50S cells, with real-time monitoring on its LCD display, and its higher per-bay output charges these cells noticeably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:229;5394-5687\"\u003e\u003cstrong\u003eQ: Is the Samsung 50S suitable for  flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for  flashlights, RC cars, or electric skateboards. It's built for EVs, e-bikes, drones, power tools, and e-mobility applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:259;5689-5991\"\u003e\u003cstrong\u003eQ: How does the 50S compare to the 50E?\u003c\/strong\u003e A: Both share the same 5000mAh capacity, but the 50S has a meaningfully higher discharge ceiling — 20A continuous (35A with thermal cutoff) versus the 50E's 9.8A — making the 50S the better pick for applications that need more current alongside the capacity.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:188;5993-6234\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:122;6236-6411\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50S without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:173;6413-6636\"\u003e\u003cstrong\u003eQ: How do I know if a 50S battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:105;6638-6768\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 Samsung INR21700-50S batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":51454225055990,"sku":"OAS1784","price":103.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-samsung-50s-flat-top-4pack-tactical-kit-main_01fdcf0f-9194-4380-a391-49cee6514e90.webp?v=1786968737"},{"product_id":"samsung-inr21700-50s-5000mah-20a-21700-battery-6-pack-with-nitecore-ums4-ui1-chargers-high-output-power-system-for-construction-sites-drone-production-studios-agricultural-field-operati","title":"Samsung INR21700-50S 5000mAh 20A 21700 Battery 6-Pack with Nitecore UMS4 \u0026 Ui1 Chargers – High-Output Power System for Construction Sites, Drone Production Studios \u0026 Agricultural Field Operations","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;195-213\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:814;215-1028\"\u003eThe Samsung 50S steps up from the 50E with the same 5000mAh capacity but a significantly higher discharge ceiling — 20A continuous without a temperature cutoff, or up to 35A with an 80°C thermal cutoff — making it a stronger choice for e-bikes, power tools, and drones that need both energy and real current delivery. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine Samsung INR21700-50S batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;1035-1073\"\u003eSamsung INR21700-50S Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:120;1075-1767\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50S (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20A (no temp cutoff) \/ 35A (80°C temp cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRapid Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e6A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, high-capacity\/high-discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.25mm × 70.6mm, max weight 72g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVs, e-bikes, drones, power tools, e-mobility, and other high-capacity high-drain battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:226;1769-1994\"\u003e\u003cem\u003eNote: Samsung's own product positioning lists the 50S for EV, e-bike, drone, power tool, and e-mobility applications, and explicitly states it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1996-2177\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:46;2184-2229\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"39:1-39:44;2231-2274\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-46:73;2275-3159\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:178;2275-2452\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the closest match here to the 50S's 2.5A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:76;2453-2528\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:147;2529-2675\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2676-2791\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:103;2792-2894\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2895-3086\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;3087-3159\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"48:1-48:47;3161-3207\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"49:1-53:136;3208-3677\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:126;3208-3333\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:62;3334-3395\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:83;3396-3478\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:63;3479-3541\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:136;3542-3677\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:37;3684-3720\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-62:56;3722-4168\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the Samsung 50S (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-66:55;4170-4550\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the Samsung 50S (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:23;4557-4579\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"72:1-72:523;4581-5103\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50S without any adapter, and the UI1's slot fits the same length range. Since the 50S has a relatively large 5000mAh capacity, charging speed does matter here: the UMS4 (up to 3,000mA on a single occupied bay) will get closer to the 50S's 2.5A rated charge current than the UI1 (up to 1,000mA), so we'd suggest running your most time-sensitive cells through the UMS4 and using the UI1 for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"76:1-76:19;5110-5128\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"78:1-82:19;5130-5284\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:35;5130-5164\"\u003eSamsung INR21700-50S Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:34;5165-5198\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:39;5199-5237\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:28;5238-5265\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:19;5266-5284\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"86:1-86:15;5291-5305\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"88:1-92:50;5307-5817\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"88:1-88:105;5307-5411\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:63;5412-5474\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:82;5475-5556\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:211;5557-5767\"\u003eThe 50S is an unprotected cell intended for compatible, purpose-built devices such as EVs, e-bikes, drones, and power tools — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"92:1-92:50;5768-5817\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"96:1-96:7;5824-5830\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:207;5832-6092\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:229;6094-6387\"\u003e\u003cstrong\u003eQ: Is the Samsung 50S suitable for flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for lashlights, RC cars, or electric skateboards. It's built for EVs, e-bikes, drones, power tools, and e-mobility applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:259;6389-6691\"\u003e\u003cstrong\u003eQ: How does the 50S compare to the 50E?\u003c\/strong\u003e A: Both share the same 5000mAh capacity, but the 50S has a meaningfully higher discharge ceiling — 20A continuous (35A with thermal cutoff) versus the 50E's 9.8A — making the 50S the better pick for applications that need more current alongside the capacity.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:101;6693-6843\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the 50S without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:402;6845-7316\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge — with a 5000mAh cell like the 50S, it will take noticeably longer to fill on the UI1 than on the UMS4.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"113:1-114:173;7318-7538\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"116:1-117:147;7540-7712\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 Samsung INR21700-50S batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":51454225088758,"sku":"OAS1785","price":133.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-samsung-50s-flat-top-6pack-construction-kit-main_07322104-76b8-4db1-85ea-23498b05ceb7.webp?v=1786968739"},{"product_id":"samsung-inr21700-50s-5000mah-20a-21700-battery-8-pack-with-xtar-vc8-8-slot-lcd-charger-high-output-power-reserve-for-professional-fleet-operations-heavy-equipment-maintenance-large-scale","title":"Samsung INR21700-50S 5000mAh 20A 21700 Battery 8-Pack with XTAR VC8 8-Slot LCD Charger – High-Output Power Reserve for Professional Fleet Operations, Heavy Equipment Maintenance \u0026 Large-Scale Field Crews","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;179-197\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:667;199-865\"\u003eThe Samsung 50S steps up from the 50E with the same 5000mAh capacity but a significantly higher discharge ceiling — 20A continuous without a temperature cutoff, or up to 35A with an 80°C thermal cutoff — making it a stronger choice for e-bikes, power tools, and drones that need both energy and real current delivery. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Samsung INR21700-50S batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;872-910\"\u003eSamsung INR21700-50S Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:120;912-1604\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50S (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e20A (no temp cutoff) \/ 35A (80°C temp cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRapid Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e6A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, high-capacity\/high-discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.25mm × 70.6mm, max weight 72g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVs, e-bikes, drones, power tools, e-mobility, and other high-capacity high-drain battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:226;1606-1831\"\u003e\u003cem\u003eNote: Samsung's own product positioning lists the 50S for EV, e-bike, drone, power tool, and e-mobility applications, and explicitly states it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1833-2014\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;2021-2045\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:139;2047-3342\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:169;2047-2215\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the closest match here to the 50S's 2.5A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:124;2216-2339\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:81;2340-2420\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:216;2421-2636\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:112;2637-2748\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:115;2749-2863\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:127;2864-2990\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:213;2991-3203\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:139;3204-3342\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:48;3349-3396\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:110;3398-3507\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the Samsung 50S (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:111;3509-3619\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:77;3621-3697\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:102;3699-3800\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"63:1-63:23;3807-3829\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:557;3831-4387\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the 50S's 70.6mm length. Since the 50S has a relatively large 5000mAh capacity, charging speed matters here: with all 8 slots occupied, the VC8 defaults to a gentler 0.5A per slot, which will take a while to fully charge a set of 5000mAh cells. If you're in a hurry, manually selecting the higher current levels (up to 3A on a single slot) will get individual cells closer to the 50S's rated charge speed, at the cost of fewer slots charging simultaneously.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:19;4394-4412\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"71:1-74:18;4414-4525\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:35;4414-4448\"\u003eSamsung INR21700-50S Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:23;4449-4471\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:36;4472-4507\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4508-4525\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:15;4532-4546\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:50;4548-5046\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4548-4652\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:63;4653-4715\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:70;4716-4785\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:211;4786-4996\"\u003eThe 50S is an unprotected cell intended for compatible, purpose-built devices such as EVs, e-bikes, drones, and power tools — it is not intended for e-cigarettes, flashlights, RC cars, or electric skateboards\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;4997-5046\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:7;5053-5059\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:182;5061-5303\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge Samsung 50S batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50S cells, with independent monitoring on each of its 8 slots.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:229;5305-5598\"\u003e\u003cstrong\u003eQ: Is the Samsung 50S suitable for flashlights?\u003c\/strong\u003e A: No. Samsung's own product positioning explicitly states this cell is not intended for  flashlights, RC cars, or electric skateboards. It's built for EVs, e-bikes, drones, power tools, and e-mobility applications.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:259;5600-5902\"\u003e\u003cstrong\u003eQ: How does the 50S compare to the 50E?\u003c\/strong\u003e A: Both share the same 5000mAh capacity, but the 50S has a meaningfully higher discharge ceiling — 20A continuous (35A with thermal cutoff) versus the 50E's 9.8A — making the 50S the better pick for applications that need more current alongside the capacity.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:114;5904-6070\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the 50S's 70.6mm length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:222;6072-6347\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:175;6349-6580\"\u003e\u003cstrong\u003eQ: How do I test if a 50S battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:139;6582-6791\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"111:1-112:109;6793-6927\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 Samsung INR21700-50S batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454225187062,"sku":"OAS1786","price":133.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-samsung-50s-flat-top-8pack-fleet-main_b2de722c-9fc5-4361-a17a-51c7329748ee.webp?v=1786968742"},{"product_id":"samsung-inr21700-50g-5000mah-high-capacity-battery-2-piece-kit-with-xtar-mc2-smart-charger","title":"Samsung INR21700-50G 5000mAh High-Capacity Battery 2-Piece Kit with XTAR MC2 Smart Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;155-173\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:551;175-725\"\u003eThe Samsung 50G is a high-energy 21700 cell in the same general class as the 50E — a genuine 5000mAh capacity with a 9.8A continuous discharge rating (up to 14.7A in short pulses), built for runtime-focused applications rather than extreme current draw. This bundle pairs 2 genuine Samsung INR21700-50G batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;732-770\"\u003eSamsung INR21700-50G Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:107;772-1464\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50G (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (4900mAh minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A (14.7A pulse, not for continuous use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.1mm × 70.15mm, max weight 69.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only (slightly recessed top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:182;1466-1647\"\u003e\u003cem\u003eNote: This cell is an energy\/runtime-focused 21700, similar in profile to the Samsung 50E — built for moderate, sustained current draw rather than extreme high-drain applications.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1649-1830\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:25;1837-1861\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"38:1-44:64;1863-2532\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:98;1863-1960\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:102;1961-2062\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:145;2063-2207\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:71;2208-2278\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:113;2279-2391\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:77;2392-2468\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:64;2469-2532\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"48:1-48:48;2539-2586\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"50:1-50:219;2588-2806\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the Samsung 50G (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:74;2808-2881\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"56:1-56:23;2888-2910\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:157;2912-3068\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the 50G's 70.15mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-60:371;3070-3440\"\u003e\u003cem\u003eImportant: The 50G supports a standard charge current of 2.45A, but the MC2 charges at a maximum of 0.5A per slot. Charging a 5000mAh cell at 0.5A will take considerably longer than on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary fast charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"64:1-64:19;3447-3465\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"66:1-69:18;3467-3558\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"66:1-66:35;3467-3501\"\u003eSamsung INR21700-50G Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:23;3502-3524\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:16;3525-3540\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:18;3541-3558\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"73:1-73:15;3565-3579\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"75:1-79:50;3581-4007\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:105;3581-3685\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:63;3686-3748\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:70;3749-3818\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:139;3819-3957\"\u003eThe 50G is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:50;3958-4007\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"83:1-83:7;4014-4020\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"85:1-86:299;4022-4381\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge Samsung 50G batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the 50G, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than the 50G's rated fast-charge current, so a full charge will take longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"88:1-89:278;4383-4704\"\u003e\u003cstrong\u003eQ: How does the 50G compare to the 50E?\u003c\/strong\u003e A: The two are very close in profile — both 5000mAh-class cells with similar continuous discharge ratings (50G: 9.8A continuous\/14.7A pulse; 50E: 9.8A). Independent testing has found the 50E slightly edges out the 50G in raw capacity, while both deliver similar overall energy.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:129;4706-4887\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the 50G's 70.15mm length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:335;4889-5286\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a 50G on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot and the 50G has a 5000mAh capacity, expect a full charge to take considerably longer than the 50G's rated 2.45A standard charge current would suggest — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:136;5288-5476\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:89;5478-5592\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 Samsung INR21700-50G batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454225219830,"sku":"OAS1787","price":24.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-samsung-50g-flat-top-2pack-kit-main_9c3ce290-b1c2-4551-9742-2b1c7d73f362.webp?v=1786968742"},{"product_id":"samsung-inr21700-50g-5000mah-high-capacity-21700-battery-4-piece-set-with-nitecore-ums4-smart-charger","title":"Samsung INR21700-50G 5000mAh High-Capacity 21700 Battery 4-Piece Set with Nitecore UMS4 Smart Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;167-185\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:609;187-795\"\u003eThe Samsung 50G is a high-energy 21700 cell in the same general class as the 50E — a genuine 5000mAh capacity with a 9.8A continuous discharge rating (up to 14.7A in short pulses), built for runtime-focused applications rather than extreme current draw. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine Samsung INR21700-50G batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;802-840\"\u003eSamsung INR21700-50G Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:107;842-1534\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50G (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (4900mAh minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A (14.7A pulse, not for continuous use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.1mm × 70.15mm, max weight 69.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only (slightly recessed top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:182;1536-1717\"\u003e\u003cem\u003eNote: This cell is an energy\/runtime-focused 21700, similar in profile to the Samsung 50E — built for moderate, sustained current draw rather than extreme high-drain applications.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1719-1900\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:30;1907-1936\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"38:1-46:95;1938-3112\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:179;1938-2116\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — the closest match here to the 50G's 2.45A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:109;2117-2225\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:121;2226-2346\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:202;2347-2548\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:116;2549-2664\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:88;2665-2752\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:192;2753-2944\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:73;2945-3017\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:95;3018-3112\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"50:1-50:53;3119-3171\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:147;3173-3319\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the Samsung 50G (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-55:33;3321-3549\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:68;3551-3618\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"61:1-61:23;3625-3647\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-63:375;3649-4023\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the 50G. Unlike a basic dual-slot travel charger, the UMS4's per-bay output (up to 3,000mA with a QC adapter on a single bay) lines up much more closely with the 50G's 2.45A standard charge current, making full charges considerably faster than a low-current charger would allow.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:223;4025-4247\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — still slower than the 50G's max 4.9A rating, but a reasonable, safe charging pace for four cells at once.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:19;4254-4272\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"71:1-74:18;4274-4387\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:35;4274-4308\"\u003eSamsung INR21700-50G Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:34;4309-4342\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:27;4343-4369\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4370-4387\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:15;4394-4408\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:50;4410-4841\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4410-4514\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:63;4515-4577\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:75;4578-4652\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:139;4653-4791\"\u003eThe 50G is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;4792-4841\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:7;4848-4854\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:279;4856-5200\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge Samsung 50G batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50G cells, with real-time monitoring on its LCD display, and its higher per-bay output charges these cells noticeably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:278;5202-5523\"\u003e\u003cstrong\u003eQ: How does the 50G compare to the 50E?\u003c\/strong\u003e A: The two are very close in profile — both 5000mAh-class cells with similar continuous discharge ratings (50G: 9.8A continuous\/14.7A pulse; 50E: 9.8A). Independent testing has found the 50E slightly edges out the 50G in raw capacity, while both deliver similar overall energy.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:188;5525-5766\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:122;5768-5943\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50G without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:173;5945-6168\"\u003e\u003cstrong\u003eQ: How do I know if a 50G battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:96;6170-6328\"\u003e\u003cstrong\u003eQ: Can I power the UMS4 with a power bank while traveling?\u003c\/strong\u003e A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:105;6330-6460\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 Samsung INR21700-50G batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":51454225252598,"sku":"OAS1788","price":95.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-samsung-50g-flat-top-4pack-set-main_fb0ba845-3428-411e-93f1-0f8cd41a5f6c.webp?v=1786968748"},{"product_id":"samsung-inr21700-50g-5000mah-high-capacity-21700-battery-6-piece-bundle-with-nitecore-ums4-ui1-smart-chargers","title":"Samsung INR21700-50G 5000mAh High-Capacity 21700 Battery 6-Piece Bundle with Nitecore UMS4 \u0026 Ui1 Smart Chargers","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;179-197\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:750;199-948\"\u003eThe Samsung 50G is a high-energy 21700 cell in the same general class as the 50E — a genuine 5000mAh capacity with a 9.8A continuous discharge rating (up to 14.7A in short pulses), built for runtime-focused applications rather than extreme current draw. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine Samsung INR21700-50G batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;955-993\"\u003eSamsung INR21700-50G Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:107;995-1687\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50G (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (4900mAh minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A (14.7A pulse, not for continuous use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.1mm × 70.15mm, max weight 69.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only (slightly recessed top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:182;1689-1870\"\u003e\u003cem\u003eNote: This cell is an energy\/runtime-focused 21700, similar in profile to the Samsung 50E — built for moderate, sustained current draw rather than extreme high-drain applications.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1872-2053\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:46;2060-2105\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"38:1-38:44;2107-2150\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-45:73;2151-3036\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:179;2151-2329\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the closest match here to the 50G's 2.45A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:76;2330-2405\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:147;2406-2552\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:116;2553-2668\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:103;2669-2771\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:192;2772-2963\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:73;2964-3036\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"47:1-47:47;3038-3084\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"48:1-52:136;3085-3554\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:126;3085-3210\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:62;3211-3272\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:83;3273-3355\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:63;3356-3418\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:136;3419-3554\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"56:1-56:37;3561-3597\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-61:56;3599-4045\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the Samsung 50G (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 1.2V Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-65:55;4047-4427\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the Samsung 50G (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:23;4434-4456\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"71:1-71:524;4458-4981\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50G without any adapter, and the UI1's slot fits the same length range. Since the 50G has a relatively large 5000mAh capacity, charging speed does matter here: the UMS4 (up to 3,000mA on a single occupied bay) will get closer to the 50G's 2.45A rated charge current than the UI1 (up to 1,000mA), so we'd suggest running your most time-sensitive cells through the UMS4 and using the UI1 for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"75:1-75:19;4988-5006\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"77:1-81:19;5008-5162\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:35;5008-5042\"\u003eSamsung INR21700-50G Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:34;5043-5076\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:39;5077-5115\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:28;5116-5143\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:19;5144-5162\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"85:1-85:15;5169-5183\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"87:1-91:50;5185-5623\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"87:1-87:105;5185-5289\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"88:1-88:63;5290-5352\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:82;5353-5434\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:139;5435-5573\"\u003eThe 50G is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:50;5574-5623\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"95:1-95:7;5630-5636\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:207;5638-5898\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:278;5900-6221\"\u003e\u003cstrong\u003eQ: How does the 50G compare to the 50E?\u003c\/strong\u003e A: The two are very close in profile — both 5000mAh-class cells with similar continuous discharge ratings (50G: 9.8A continuous\/14.7A pulse; 50E: 9.8A). Independent testing has found the 50E slightly edges out the 50G in raw capacity, while both deliver similar overall energy.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:101;6223-6373\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the 50G without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:402;6375-6846\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge — with a 5000mAh cell like the 50G, it will take noticeably longer to fill on the UI1 than on the UMS4.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:173;6848-7068\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"112:1-113:147;7070-7242\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 Samsung INR21700-50G batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":51454225318134,"sku":"OAS1789","price":119.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-samsung-50g-flat-top-6pack-bundle-main_a8a0b7cc-3348-4a53-9f43-dda5233a3aa0.webp?v=1786968752"},{"product_id":"samsung-inr21700-50g-5000mah-high-capacity-21700-battery-8-piece-bundle-with-xtar-vc8-8-slot-smart-charger","title":"Samsung INR21700-50G 5000mAh High-Capacity 21700 Battery 8-Piece Bundle with XTAR VC8 8-Slot Smart Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;163-181\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:603;183-785\"\u003eThe Samsung 50G is a high-energy 21700 cell in the same general class as the 50E — a genuine 5000mAh capacity with a 9.8A continuous discharge rating (up to 14.7A in short pulses), built for runtime-focused applications rather than extreme current draw. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Samsung INR21700-50G batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:39;792-830\"\u003eSamsung INR21700-50G Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:107;832-1524\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSamsung INR21700-50G (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (4900mAh minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9.8A (14.7A pulse, not for continuous use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.9A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.1mm × 70.15mm, max weight 69.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only (slightly recessed top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, power tools, energy storage systems, robotics, professional battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:182;1526-1707\"\u003e\u003cem\u003eNote: This cell is an energy\/runtime-focused 21700, similar in profile to the Samsung 50E — built for moderate, sustained current draw rather than extreme high-drain applications.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1709-1890\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:25;1897-1921\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"38:1-46:139;1923-3219\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:170;1923-2092\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the closest match here to the 50G's 2.45A standard charge current\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:124;2093-2216\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:81;2217-2297\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:216;2298-2513\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:112;2514-2625\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:115;2626-2740\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:127;2741-2867\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:213;2868-3080\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:139;3081-3219\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"50:1-50:48;3226-3273\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:110;3275-3384\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the Samsung 50G (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-54:111;3386-3496\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"56:1-56:77;3498-3574\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:102;3576-3677\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"62:1-62:23;3684-3706\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-64:558;3708-4265\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the 50G's 70.15mm length. Since the 50G has a relatively large 5000mAh capacity, charging speed matters here: with all 8 slots occupied, the VC8 defaults to a gentler 0.5A per slot, which will take a while to fully charge a set of 5000mAh cells. If you're in a hurry, manually selecting the higher current levels (up to 3A on a single slot) will get individual cells closer to the 50G's rated charge speed, at the cost of fewer slots charging simultaneously.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"68:1-68:19;4272-4290\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"70:1-73:18;4292-4403\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:35;4292-4326\"\u003eSamsung INR21700-50G Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:23;4327-4349\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:36;4350-4385\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:18;4386-4403\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"77:1-77:15;4410-4424\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"79:1-83:50;4426-4852\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:105;4426-4530\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:63;4531-4593\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:70;4594-4663\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:139;4664-4802\"\u003eThe 50G is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, power tools, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:50;4803-4852\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"87:1-87:7;4859-4865\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:182;4867-5109\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge Samsung 50G batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50G cells, with independent monitoring on each of its 8 slots.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:278;5111-5432\"\u003e\u003cstrong\u003eQ: How does the 50G compare to the 50E?\u003c\/strong\u003e A: The two are very close in profile — both 5000mAh-class cells with similar continuous discharge ratings (50G: 9.8A continuous\/14.7A pulse; 50E: 9.8A). Independent testing has found the 50E slightly edges out the 50G in raw capacity, while both deliver similar overall energy.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:115;5434-5601\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the 50G's 70.15mm length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:222;5603-5878\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:175;5880-6111\"\u003e\u003cstrong\u003eQ: How do I test if a 50G battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:139;6113-6322\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:109;6324-6458\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 Samsung INR21700-50G batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"Default Title","offer_id":51454225416438,"sku":"OAS1790","price":115.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-samsung-50g-flat-top-8pack-bundle-main_2ea70d4e-cba1-4b42-8024-e535a7b4819f.webp?v=1786968754"},{"product_id":"lg-inr21700-m50lt-5000mah-high-capacity-21700-battery-2-piece-set-with-xtar-mc2-smart-charger-7-275a-continuous-with-60c-thermal-cutoff","title":"LG INR21700-M50LT 5000mAh High-Capacity 21700 Battery 2-Piece Set with XTAR MC2 Smart Charger | 7.275A Continuous with 60°C Thermal Cutoff","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;169-187\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:638;189-826\"\u003eThe LG M50LT is a long-life variant of the M50 family, carrying the same 5000mAh-class capacity while offering roughly double the rated cycle life (approximately 1000 cycles) compared to the standard M50T — making it a strong pick for e-bikes, ESS packs, and other applications where you'll be cycling the battery repeatedly over years of use. This bundle pairs 2 genuine LG INR21700-M50LT batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;833-868\"\u003eLG INR21700-M50LT Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:113;870-1641\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLG INR21700-M50LT (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (approx. 4800mAh typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.6–3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1.44A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.36–3.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7.275A (60°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1000 cycles (approx. 2× the standard M50T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused, long-cycle-life formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15–21.44mm × 70.3–70.4mm, approx. weight 67.7–69.25g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, ESS modules, industrial devices, long-runtime and long-cycle-life battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:197;1643-1839\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — it's built for applications that need maximum capacity and long-term cycle durability rather than extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1841-2022\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;2029-2053\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-45:64;2055-2724\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:98;2055-2152\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:102;2153-2254\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:145;2255-2399\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:71;2400-2470\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:113;2471-2583\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:77;2584-2660\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:64;2661-2724\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"49:1-49:48;2731-2778\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"51:1-51:216;2780-2995\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the LG M50LT (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:74;2997-3070\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:23;3077-3099\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:164;3101-3264\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the M50LT's ~70.3–70.4mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-61:352;3266-3617\"\u003e\u003cem\u003eImportant: This is a large 5000mAh cell, and the MC2 charges at a maximum of 0.5A per slot. A full charge at that rate will take considerably longer than it would on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary fast charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"65:1-65:19;3624-3642\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"67:1-70:18;3644-3732\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:32;3644-3675\"\u003eLG INR21700-M50LT Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:23;3676-3698\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:16;3699-3714\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:18;3715-3732\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"74:1-74:15;3739-3753\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"76:1-80:50;3755-4183\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:105;3755-3859\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:63;3860-3922\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:70;3923-3992\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:141;3993-4133\"\u003eThe M50LT is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, ESS modules, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:50;4134-4183\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"84:1-84:7;4190-4196\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"86:1-87:301;4198-4556\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge LG M50LT batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the M50LT, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than what this cell can typically accept, so a full charge will take longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:223;4558-4847\"\u003e\u003cstrong\u003eQ: What makes the M50LT different from other M50-family cells?\u003c\/strong\u003e A: The M50LT is specifically built for longer cycle life — roughly 1000 cycles, about double the rated cycle life of the standard M50T — while keeping the same general 5000mAh-class capacity and moderate discharge profile.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:275;4849-5162\"\u003e\u003cstrong\u003eQ: Is the M50LT a high-drain cell?\u003c\/strong\u003e A: No. It's built primarily for energy density, runtime, and long-term cycle durability, with a moderate continuous discharge rating around 7.275A (60°C cutoff). It's better suited to e-bikes, ESS, and long-runtime packs than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:123;5164-5339\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the M50LT's length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:249;5341-5655\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge an M50LT on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot and the M50LT has a 5000mAh-class capacity, expect a full charge to take several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:136;5657-5845\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:86;5847-5958\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 LG INR21700-M50LT batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"LG","offers":[{"title":"Default Title","offer_id":51454225449206,"sku":"OAS1803","price":24.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-lg-m50lt-flat-top-2pack-set-main_8501482d-20f0-4c23-a043-aafba85bcec6.webp?v=1786968753"},{"product_id":"lg-inr21700-m50lt-5000mah-high-capacity-21700-battery-4-piece-set-with-nitecore-ums4-smart-charger-safe-7-275a-continuous-discharge-with-60c-thermal-cutoff","title":"LG INR21700-M50LT 5000mAh High-Capacity 21700 Battery 4-Piece Set with Nitecore UMS4 Smart Charger | Safe 7.275A Continuous Discharge with 60°C Thermal Cutoff","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;181-199\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:696;201-896\"\u003eThe LG M50LT is a long-life variant of the M50 family, carrying the same 5000mAh-class capacity while offering roughly double the rated cycle life (approximately 1000 cycles) compared to the standard M50T — making it a strong pick for e-bikes, ESS packs, and other applications where you'll be cycling the battery repeatedly over years of use. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine LG INR21700-M50LT batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;903-938\"\u003eLG INR21700-M50LT Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:113;940-1711\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLG INR21700-M50LT (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (approx. 4800mAh typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.6–3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1.44A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.36–3.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7.275A (60°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1000 cycles (approx. 2× the standard M50T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused, long-cycle-life formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15–21.44mm × 70.3–70.4mm, approx. weight 67.7–69.25g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, ESS modules, industrial devices, long-runtime and long-cycle-life battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:197;1713-1909\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — it's built for applications that need maximum capacity and long-term cycle durability rather than extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1911-2092\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:30;2099-2128\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:95;2130-3340\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:215;2130-2344\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — well beyond the M50LT's ~1.44A standard charge current, making single-bay charges considerably faster\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:109;2345-2453\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:121;2454-2574\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:202;2575-2776\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2777-2892\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:88;2893-2980\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2981-3172\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;3173-3245\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:95;3246-3340\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:53;3347-3399\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:144;3401-3544\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the LG M50LT (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-56:33;3546-3774\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:68;3776-3843\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"62:1-62:23;3850-3872\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-64:257;3874-4130\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the M50LT. Compared to a basic dual-slot travel charger, the UMS4's much higher per-bay output charges a large 5000mAh-class cell like this considerably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-66:273;4132-4404\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — a reasonable, safe charging pace for four large-capacity cells at once, though it will still take a few hours for a full charge given the M50LT's capacity.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:19;4411-4429\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"72:1-75:18;4431-4541\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:32;4431-4462\"\u003eLG INR21700-M50LT Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:34;4463-4496\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:27;4497-4523\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:18;4524-4541\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"79:1-79:15;4548-4562\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"81:1-85:50;4564-4997\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:105;4564-4668\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:63;4669-4731\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:75;4732-4806\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:141;4807-4947\"\u003eThe M50LT is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, ESS modules, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:50;4948-4997\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"89:1-89:7;5004-5010\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:296;5012-5370\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge LG M50LT batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for M50LT cells, with real-time monitoring on its LCD display, and its higher per-bay output charges these large-capacity cells noticeably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:223;5372-5661\"\u003e\u003cstrong\u003eQ: What makes the M50LT different from other M50-family cells?\u003c\/strong\u003e A: The M50LT is specifically built for longer cycle life — roughly 1000 cycles, about double the rated cycle life of the standard M50T — while keeping the same general 5000mAh-class capacity and moderate discharge profile.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:275;5663-5976\"\u003e\u003cstrong\u003eQ: Is the M50LT a high-drain cell?\u003c\/strong\u003e A: No. It's built primarily for energy density, runtime, and long-term cycle durability, with a moderate continuous discharge rating around 7.275A (60°C cutoff). It's better suited to e-bikes, ESS, and long-runtime packs than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:188;5978-6219\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:124;6221-6398\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the M50LT without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:173;6400-6626\"\u003e\u003cstrong\u003eQ: How do I know if an M50LT battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:96;6628-6786\"\u003e\u003cstrong\u003eQ: Can I power the UMS4 with a power bank while traveling?\u003c\/strong\u003e A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"112:1-113:102;6788-6915\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 LG INR21700-M50LT batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"LG","offers":[{"title":"Default Title","offer_id":51454225481974,"sku":"OAS1804","price":94.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-lg-m50lt-flat-top-4pack-set-main_3e3dd3d3-5648-4b11-a101-40f83f663dc3.webp?v=1786968759"},{"product_id":"lg-inr21700-m50lt-5000mah-high-capacity-21700-battery-6-piece-bundle-with-nitecore-ums4-ui1-smart-chargers-safe-7-275a-continuous-discharge-with-60c-thermal-cutoff","title":"LG INR21700-M50LT 5000mAh High-Capacity 21700 Battery 6-Piece Bundle with Nitecore UMS4 \u0026 Ui1 Smart Chargers | Safe 7.275A Continuous Discharge with 60°C Thermal Cutoff","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;193-211\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:837;213-1049\"\u003eThe LG M50LT is a long-life variant of the M50 family, carrying the same 5000mAh-class capacity while offering roughly double the rated cycle life (approximately 1000 cycles) compared to the standard M50T — making it a strong pick for e-bikes, ESS packs, and other applications where you'll be cycling the battery repeatedly over years of use. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine LG INR21700-M50LT batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;1056-1091\"\u003eLG INR21700-M50LT Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:113;1093-1864\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLG INR21700-M50LT (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (approx. 4800mAh typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.6–3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1.44A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.36–3.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7.275A (60°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1000 cycles (approx. 2× the standard M50T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused, long-cycle-life formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15–21.44mm × 70.3–70.4mm, approx. weight 67.7–69.25g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, ESS modules, industrial devices, long-runtime and long-cycle-life battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:197;1866-2062\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — it's built for applications that need maximum capacity and long-term cycle durability rather than extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;2064-2245\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:46;2252-2297\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"39:1-39:44;2299-2342\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-46:73;2343-3264\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:215;2343-2557\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — well beyond the M50LT's ~1.44A standard charge current, making single-bay charges considerably faster\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:76;2558-2633\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:147;2634-2780\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2781-2896\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:103;2897-2999\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;3000-3191\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;3192-3264\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"48:1-48:47;3266-3312\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"49:1-53:136;3313-3782\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:126;3313-3438\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:62;3439-3500\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:83;3501-3583\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:63;3584-3646\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:136;3647-3782\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:37;3789-3825\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-62:56;3827-4270\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the LG M50LT (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-66:55;4272-4649\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the LG M50LT (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:23;4656-4678\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"72:1-72:493;4680-5172\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the M50LT without any adapter, and the UI1's slot fits the same length range. Since the M50LT has a large 5000mAh-class capacity, charging speed does matter here: the UMS4 (up to 3,000mA on a single occupied bay) charges noticeably faster than the UI1 (up to 1,000mA), so we'd suggest running your most time-sensitive cells through the UMS4 and using the UI1 for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"76:1-76:19;5179-5197\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"78:1-82:19;5199-5350\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:32;5199-5230\"\u003eLG INR21700-M50LT Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:34;5231-5264\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:39;5265-5303\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:28;5304-5331\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:19;5332-5350\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"86:1-86:15;5357-5371\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"88:1-92:50;5373-5813\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"88:1-88:105;5373-5477\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:63;5478-5540\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:82;5541-5622\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:141;5623-5763\"\u003eThe M50LT is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, ESS modules, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"92:1-92:50;5764-5813\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"96:1-96:7;5820-5826\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:207;5828-6088\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:223;6090-6379\"\u003e\u003cstrong\u003eQ: What makes the M50LT different from other M50-family cells?\u003c\/strong\u003e A: The M50LT is specifically built for longer cycle life — roughly 1000 cycles, about double the rated cycle life of the standard M50T — while keeping the same general 5000mAh-class capacity and moderate discharge profile.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:275;6381-6694\"\u003e\u003cstrong\u003eQ: Is the M50LT a high-drain cell?\u003c\/strong\u003e A: No. It's built primarily for energy density, runtime, and long-term cycle durability, with a moderate continuous discharge rating around 7.275A (60°C cutoff). It's better suited to e-bikes, ESS, and long-runtime packs than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:103;6696-6848\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the M50LT without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:410;6850-7329\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge — with a 5000mAh-class cell like the M50LT, it will take noticeably longer to fill on the UI1 than on the UMS4.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"113:1-114:173;7331-7551\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"116:1-117:144;7553-7722\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 LG INR21700-M50LT batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"LG","offers":[{"title":"Default Title","offer_id":51454225711350,"sku":"OAS1805","price":116.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-lg-m50lt-flat-top-6pack-bundle-main_f2546c8e-591c-4bb9-95cc-0ab4e93c432e.webp?v=1786968763"},{"product_id":"lg-inr21700-m50lt-5000mah-high-capacity-21700-battery-8-piece-kit-with-xtar-vc8-8-slot-smart-charger-safe-7-275a-continuous-discharge-60c-thermal-cutoff-40ah-foundation","title":"LG INR21700-M50LT 5000mAh High-Capacity 21700 Battery 8-Piece Kit with XTAR VC8 8-Slot Smart Charger | Safe 7.275A Continuous Discharge \u0026 60°C Thermal Cutoff | 40Ah Foundation","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;177-195\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:690;197-886\"\u003eThe LG M50LT is a long-life variant of the M50 family, carrying the same 5000mAh-class capacity while offering roughly double the rated cycle life (approximately 1000 cycles) compared to the standard M50T — making it a strong pick for e-bikes, ESS packs, and other applications where you'll be cycling the battery repeatedly over years of use. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine LG INR21700-M50LT batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;893-928\"\u003eLG INR21700-M50LT Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:113;930-1701\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLG INR21700-M50LT (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh (approx. 4800mAh typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.6–3.63V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1.44A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~3.36–3.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7.275A (60°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~1000 cycles (approx. 2× the standard M50T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused, long-cycle-life formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15–21.44mm × 70.3–70.4mm, approx. weight 67.7–69.25g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eE-bikes, ESS modules, industrial devices, long-runtime and long-cycle-life battery pack builds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:197;1703-1899\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — it's built for applications that need maximum capacity and long-term cycle durability rather than extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1901-2082\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;2089-2113\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:139;2115-3448\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:207;2115-2321\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — well beyond the M50LT's ~1.44A standard charge current, making single-slot charges considerably faster\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:124;2322-2445\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:81;2446-2526\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:216;2527-2742\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:112;2743-2854\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:115;2855-2969\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:127;2970-3096\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:213;3097-3309\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:139;3310-3448\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:48;3455-3502\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:107;3504-3610\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the LG M50LT (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:111;3612-3722\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:77;3724-3800\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:102;3802-3903\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"63:1-63:23;3910-3932\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:551;3934-4484\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the M50LT's ~70.3–70.4mm length. Since the M50LT has a large 5000mAh-class capacity, charging speed matters here: with all 8 slots occupied, the VC8 defaults to a gentler 0.5A per slot, which will take a while to fully charge a set of large-capacity cells. If you're in a hurry, manually selecting the higher current levels (up to 3A on a single slot) will charge individual cells noticeably faster, at the cost of fewer slots charging simultaneously.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:19;4491-4509\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"71:1-74:18;4511-4619\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:32;4511-4542\"\u003eLG INR21700-M50LT Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:23;4543-4565\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:36;4566-4601\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4602-4619\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:15;4626-4640\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:50;4642-5070\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4642-4746\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:63;4747-4809\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:70;4810-4879\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:141;4880-5020\"\u003eThe M50LT is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, ESS modules, and engineered battery packs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;5021-5070\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:7;5077-5083\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:184;5085-5326\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge LG M50LT batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for M50LT cells, with independent monitoring on each of its 8 slots.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:223;5328-5617\"\u003e\u003cstrong\u003eQ: What makes the M50LT different from other M50-family cells?\u003c\/strong\u003e A: The M50LT is specifically built for longer cycle life — roughly 1000 cycles, about double the rated cycle life of the standard M50T — while keeping the same general 5000mAh-class capacity and moderate discharge profile.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:275;5619-5932\"\u003e\u003cstrong\u003eQ: Is the M50LT a high-drain cell?\u003c\/strong\u003e A: No. It's built primarily for energy density, runtime, and long-term cycle durability, with a moderate continuous discharge rating around 7.275A (60°C cutoff). It's better suited to e-bikes, ESS, and long-runtime packs than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:109;5934-6095\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the M50LT's length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:222;6097-6372\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:175;6374-6608\"\u003e\u003cstrong\u003eQ: How do I test if an M50LT battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:139;6610-6819\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"111:1-112:106;6821-6952\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 LG INR21700-M50LT batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"LG","offers":[{"title":"Default Title","offer_id":51454225776886,"sku":"OAS1806","price":110.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-lg-m50lt-flat-top-8pack-kit-main_a301eae9-5780-4e4f-a2a0-c30644bb8b90.webp?v=1786968764"},{"product_id":"molicel-inr21700-p42a-4200mah-45a-21700-battery-2-pack-with-xtar-mc2-dual-slot-charger-extreme-high-power-kit-for-high-wattage-vapes-professional-tactical-lights-high-performance-drones","title":"Molicel INR21700-P42A 4200mAh 45A 21700 Battery 2-Pack with XTAR MC2 Dual-Slot Charger – Extreme High-Power Kit for Professional Tactical Lights \u0026 High-Performance Drones","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;157-175\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:592;177-768\"\u003eThe Molicel P42A is one of the strongest 21700 cells available — a 4200mAh typical capacity paired with a genuine 45A continuous discharge rating and a very low AC impedance (\u0026lt;15mΩ), making it a favorite for high-drain battery pack builds that need serious current without sacrificing runtime. This bundle pairs 2 genuine Molicel INR21700-P42A batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;775-814\"\u003eMolicel INR21700-P42A Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-31:157;816-1620\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P42A (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4200mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e8.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\u0026lt;15mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~500 cycles at 4.2A charge\/10A discharge to 80% capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.2–21.7mm × 70–70.2mm, approx. weight 66.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel specifies this as a pack-only cell for use with proper battery management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:218;1622-1839\"\u003e\u003cem\u003eImportant: Molicel positions the P42A as a pack-only, high-power cell intended for use within a properly engineered battery management system (BMS) — not as a standalone consumer replacement cell for casual devices.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"35:1-35:182;1841-2022\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"39:1-39:25;2029-2053\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"41:1-47:64;2055-2724\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:98;2055-2152\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:102;2153-2254\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:145;2255-2399\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:71;2400-2470\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:113;2471-2583\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:77;2584-2660\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:64;2661-2724\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:48;2731-2778\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:220;2780-2999\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the Molicel P42A (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:74;3001-3074\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"59:1-59:23;3081-3103\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-61:161;3105-3265\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the P42A's ~70–70.2mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-63:447;3267-3713\"\u003e\u003cem\u003eImportant: The P42A supports a standard charge current of 4.2A (up to 8.4A max), but the MC2 charges at a maximum of 0.5A per slot — a very large gap. Charging a 4200mAh high-power cell at 0.5A will take considerably longer than its rated charge time (1.5 hours at standard current) suggests, likely stretching to several hours. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"67:1-67:19;3720-3738\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"69:1-72:18;3740-3832\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:36;3740-3775\"\u003eMolicel INR21700-P42A Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:23;3776-3798\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:16;3799-3814\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:18;3815-3832\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"76:1-76:15;3839-3853\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"78:1-82:50;3855-4346\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:105;3855-3959\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:63;3960-4022\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:70;4023-4092\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:204;4093-4296\"\u003eThe P42A is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:50;4297-4346\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"86:1-86:7;4353-4359\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"88:1-89:323;4361-4745\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge Molicel P42A batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the P42A, with proper 4.2V cutoff voltage. Just be aware the charging current is dramatically lower than this cell's 4.2A standard charge rate, so a full charge will take considerably longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:263;4747-5082\"\u003e\u003cstrong\u003eQ: Is the P42A meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel positions the P42A as a pack-only cell intended for use within a properly designed battery management system, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:122;5084-5258\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the P42A's length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:333;5260-5656\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a P42A on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot while the P42A is rated for 4.2A standard charging (1.5-hour charge time at that rate), expect a full charge on the MC2 to take considerably longer — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:136;5658-5846\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:90;5848-5963\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 Molicel INR21700-P42A batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454225809654,"sku":"OAS1811","price":28.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-molicel-p42a-flat-top-2pack-kit-main_afca6368-8bfb-4e86-b195-a7b29ad0d385.webp?v=1786968765"},{"product_id":"molicel-inr21700-p42a-4200mah-45a-21700-battery-4-pack-with-nitecore-ums4-smart-charger-extreme-high-power-kit-for-professional-camera-flashes-performance-drones-high-end-vape-setups","title":"Molicel INR21700-P42A 4200mAh 45A 21700 Battery 4-Pack with Nitecore UMS4 Smart Charger – Extreme High-Power Kit for Professional Camera Flashes, Performance Drones \u0026 High-End Setups","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;169-187\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:650;189-838\"\u003eThe Molicel P42A is one of the strongest 21700 cells available — a 4200mAh typical capacity paired with a genuine 45A continuous discharge rating and a very low AC impedance (\u0026lt;15mΩ), making it a favorite for high-drain battery pack builds that need serious current without sacrificing runtime. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine Molicel INR21700-P42A batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;845-884\"\u003eMolicel INR21700-P42A Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-31:157;886-1690\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P42A (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4200mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e8.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\u0026lt;15mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~500 cycles at 4.2A charge\/10A discharge to 80% capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.2–21.7mm × 70–70.2mm, approx. weight 66.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel specifies this as a pack-only cell for use with proper battery management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:218;1692-1909\"\u003e\u003cem\u003eImportant: Molicel positions the P42A as a pack-only, high-power cell intended for use within a properly engineered battery management system (BMS) — not as a standalone consumer replacement cell for casual devices.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"35:1-35:182;1911-2092\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"39:1-39:30;2099-2128\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"41:1-49:95;2130-3352\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:227;2130-2356\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — still well below the P42A's 4.2A standard charge current, but a meaningful step up from a basic dual-slot charger\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:109;2357-2465\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:121;2466-2586\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:202;2587-2788\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:116;2789-2904\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:88;2905-2992\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:192;2993-3184\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:73;3185-3257\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:95;3258-3352\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"53:1-53:53;3359-3411\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:148;3413-3560\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the Molicel P42A (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-58:33;3562-3790\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-60:68;3792-3859\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"64:1-64:23;3866-3888\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-66:369;3890-4258\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the P42A. Compared to a basic dual-slot travel charger, the UMS4's higher per-bay output (up to 3,000mA with a QC adapter on a single bay) narrows the gap to the P42A's 4.2A rated charge current considerably, though it still won't reach the cell's full rated charge speed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"68:1-68:273;4260-4532\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — a safe charging pace for four high-power cells at once, though full charges will still take a few hours given the current gap versus the P42A's rated 4.2A.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"72:1-72:19;4539-4557\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"74:1-77:18;4559-4673\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:36;4559-4594\"\u003eMolicel INR21700-P42A Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:34;4595-4628\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:27;4629-4655\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:18;4656-4673\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"81:1-81:15;4680-4694\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"83:1-87:50;4696-5192\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:105;4696-4800\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:63;4801-4863\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:75;4864-4938\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"86:1-86:204;4939-5142\"\u003eThe P42A is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"87:1-87:50;5143-5192\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"91:1-91:7;5199-5205\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:336;5207-5609\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge Molicel P42A batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P42A cells, with real-time monitoring on its LCD display. Its per-bay output is still below the P42A's full 4.2A rated charge current, but it charges these cells considerably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:263;5611-5946\"\u003e\u003cstrong\u003eQ: Is the P42A meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel positions the P42A as a pack-only cell intended for use within a properly designed battery management system, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:188;5948-6189\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:123;6191-6367\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the P42A without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:173;6369-6593\"\u003e\u003cstrong\u003eQ: How do I know if a P42A battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:96;6595-6753\"\u003e\u003cstrong\u003eQ: Can I power the UMS4 with a power bank while traveling?\u003c\/strong\u003e A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"111:1-112:106;6755-6886\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 Molicel INR21700-P42A batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454225842422,"sku":"OAS1812","price":103.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-molicel-p42a-flat-top-4pack-kit-main_7828dadd-bc13-45ff-9be5-710edb818b9e.webp?v=1786968771"},{"product_id":"molicel-inr21700-p42a-4200mah-45a-21700-battery-6-pack-with-nitecore-ums4-ui1-chargers-extreme-high-output-power-system-for-professional-film-sets-high-performance-drone-fleets-competit","title":"Molicel INR21700-P42A 4200mAh 45A 21700 Battery 6-Pack with Nitecore UMS4 \u0026 Ui1 Chargers – Extreme High-Output Power System for Professional Film Sets, High-Performance Drone Fleets \u0026 Competitive RC Events","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;181-199\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:791;201-991\"\u003eThe Molicel P42A is one of the strongest 21700 cells available — a 4200mAh typical capacity paired with a genuine 45A continuous discharge rating and a very low AC impedance (\u0026lt;15mΩ), making it a favorite for high-drain battery pack builds that need serious current without sacrificing runtime. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine Molicel INR21700-P42A batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;998-1037\"\u003eMolicel INR21700-P42A Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-31:157;1039-1843\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P42A (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4200mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e8.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\u0026lt;15mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~500 cycles at 4.2A charge\/10A discharge to 80% capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.2–21.7mm × 70–70.2mm, approx. weight 66.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel specifies this as a pack-only cell for use with proper battery management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:218;1845-2062\"\u003e\u003cem\u003eImportant: Molicel positions the P42A as a pack-only, high-power cell intended for use within a properly engineered battery management system (BMS) — not as a standalone consumer replacement cell for casual devices.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"35:1-35:182;2064-2245\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"39:1-39:46;2252-2297\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"41:1-41:44;2299-2342\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"42:1-48:73;2343-3251\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:202;2343-2544\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the closest match here to the P42A's 4.2A standard charge current, though still below it\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:76;2545-2620\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:147;2621-2767\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:116;2768-2883\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:103;2884-2986\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:192;2987-3178\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:73;3179-3251\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"50:1-50:47;3253-3299\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"51:1-55:136;3300-3769\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:126;3300-3425\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:62;3426-3487\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:83;3488-3570\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"54:1-54:63;3571-3633\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"55:1-55:136;3634-3769\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"59:1-59:37;3776-3812\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-64:56;3814-4261\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the Molicel P42A (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-68:55;4263-4644\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the Molicel P42A (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"72:1-72:23;4651-4673\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"74:1-74:568;4675-5242\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the P42A without any adapter, and the UI1's slot fits the same length range. Given this is a high-power cell with a demanding 4.2A rated charge current, neither charger will match the P42A's full rated charge speed, but the UMS4 (up to 3,000mA on a single occupied bay) gets meaningfully closer than the UI1 (up to 1,000mA). We'd suggest running your most time-sensitive cells through the UMS4 and treating the UI1 as a slower backup for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:19;5249-5267\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:19;5269-5424\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:36;5269-5304\"\u003eMolicel INR21700-P42A Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:34;5305-5338\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:39;5339-5377\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:28;5378-5405\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:19;5406-5424\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:15;5431-5445\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"90:1-94:50;5447-5950\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:105;5447-5551\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:63;5552-5614\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"92:1-92:82;5615-5696\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"93:1-93:204;5697-5900\"\u003eThe P42A is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"94:1-94:50;5901-5950\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"98:1-98:7;5957-5963\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:207;5965-6225\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:263;6227-6562\"\u003e\u003cstrong\u003eQ: Is the P42A meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel positions the P42A as a pack-only cell intended for use within a properly designed battery management system, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:213;6564-6843\"\u003e\u003cstrong\u003eQ: Are Molicel P42A batteries safe to charge in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 automatically recognize Li-ion chemistry and apply the correct charging voltage (4.2V) and current for P42A cells — though neither will reach the cell's full 4.2A rated charge speed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:102;6845-6996\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the P42A without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"112:1-113:299;6998-7366\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"115:1-116:173;7368-7588\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"118:1-119:148;7590-7763\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 Molicel INR21700-P42A batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454225875190,"sku":"OAS1813","price":128.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-molicel-p42a-flat-top-6pack-system-main_d08d3b24-d329-437c-9d0a-0beda9f2ac37.webp?v=1786968775"},{"product_id":"molicel-inr21700-p42a-4200mah-45a-21700-battery-8-pack-with-xtar-vc8-8-slot-lcd-charger-extreme-high-output-power-reserve-for-professional-production-crews-search-rescue-units-high-inte","title":"Molicel INR21700-P42A 4200mAh 45A 21700 Battery 8-Pack with XTAR VC8 8-Slot LCD Charger – Extreme High-Output Power Reserve for Professional Production Crews, Search \u0026 Rescue Units \u0026 High-Intensity Field Operations","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;165-183\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:644;185-828\"\u003eThe Molicel P42A is one of the strongest 21700 cells available — a 4200mAh typical capacity paired with a genuine 45A continuous discharge rating and a very low AC impedance (\u0026lt;15mΩ), making it a favorite for high-drain battery pack builds that need serious current without sacrificing runtime. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Molicel INR21700-P42A batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;835-874\"\u003eMolicel INR21700-P42A Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-31:157;876-1680\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P42A (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4200mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.2A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e8.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e\u0026lt;15mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCycle Life\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~500 cycles at 4.2A charge\/10A discharge to 80% capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.2–21.7mm × 70–70.2mm, approx. weight 66.5g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel specifies this as a pack-only cell for use with proper battery management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:218;1682-1899\"\u003e\u003cem\u003eImportant: Molicel positions the P42A as a pack-only, high-power cell intended for use within a properly engineered battery management system (BMS) — not as a standalone consumer replacement cell for casual devices.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"35:1-35:182;1901-2082\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"39:1-39:25;2089-2113\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"41:1-49:139;2115-3434\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:193;2115-2307\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the closest match here to the P42A's 4.2A standard charge current, though still below it\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:124;2308-2431\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:81;2432-2512\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:216;2513-2728\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:112;2729-2840\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:115;2841-2955\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:127;2956-3082\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:213;3083-3295\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:139;3296-3434\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"53:1-53:48;3441-3488\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:111;3490-3600\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the Molicel P42A (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:111;3602-3712\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:77;3714-3790\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-61:102;3792-3893\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"65:1-65:23;3900-3922\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"67:1-67:454;3924-4377\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the P42A's ~70–70.2mm length. Given this is a high-power cell with a demanding 4.2A rated charge current, the VC8 won't match the P42A's full rated charge speed even on a single slot, but manually selecting the higher current levels (up to 3A on one slot) gets meaningfully closer than the default 0.5A-per-slot setting used when all 8 bays are occupied.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"71:1-71:19;4384-4402\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"73:1-76:18;4404-4516\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:36;4404-4439\"\u003eMolicel INR21700-P42A Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:23;4440-4462\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:36;4463-4498\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:18;4499-4516\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"80:1-80:15;4523-4537\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"82:1-86:50;4539-5030\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:105;4539-4643\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:63;4644-4706\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:70;4707-4776\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:204;4777-4980\"\u003eThe P42A is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"86:1-86:50;4981-5030\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"90:1-90:7;5037-5043\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:247;5045-5353\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge Molicel P42A batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P42A cells, with independent monitoring on each of its 8 slots — though it won't reach the cell's full 4.2A rated charge speed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:263;5355-5690\"\u003e\u003cstrong\u003eQ: Is the P42A meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel positions the P42A as a pack-only cell intended for use within a properly designed battery management system, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:108;5692-5852\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the P42A's length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:222;5854-6129\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:175;6131-6363\"\u003e\u003cstrong\u003eQ: How do I test if a P42A battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:139;6365-6574\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:110;6576-6711\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 Molicel INR21700-P42A batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454225907958,"sku":"OAS1814","price":128.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-molicel-p42a-flat-top-8pack-reserve-main_ee6a92f5-3368-4b55-ae00-f8328eeaf918.webp?v=1786968776"},{"product_id":"molicel-inr21700-p45b-4500mah-45a-21700-battery-2-pack-with-xtar-mc2-dual-slot-charger-flagship-extreme-high-power-kit-for-high-wattage-vapes-professional-tactical-lights-high-performance","title":"Molicel INR21700-P45B 4500mAh 45A 21700 Battery 2-Pack with XTAR MC2 Dual-Slot Charger – Flagship Extreme High-Power Kit for Professional Tactical Lights \u0026 High-Performance Drones","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;157-175\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:538;177-714\"\u003eThe Molicel P45B is the newer, refined follow-up to the P42A — a 4500mAh typical capacity (7% more than the P42A) with the same 45A continuous discharge rating, but a meaningfully lower impedance and a much stronger fast-charge capability. This bundle pairs 2 genuine Molicel INR21700-P45B batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;721-760\"\u003eMolicel INR21700-P45B Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-30:145;762-1591\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P45B (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4300mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e13.5A (60°C cutoff, 3C fast-charge capable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Impedance\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7mΩ AC (30% SOC) \/ ~15mΩ DC (50% SOC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.55mm × 70.15mm max, approx. weight 70g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top (Button Top also available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel recommends assembly in a pack with its own protection circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:244;1593-1836\"\u003e\u003cem\u003eImportant: Molicel's official documentation recommends the P45B be assembled into a pack with a proper protection circuit — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"34:1-34:182;1838-2019\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"38:1-38:25;2026-2050\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-46:64;2052-2721\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:98;2052-2149\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:102;2150-2251\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:145;2252-2396\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:71;2397-2467\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:113;2468-2580\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:77;2581-2657\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:64;2658-2721\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"50:1-50:48;2728-2775\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:220;2777-2996\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the Molicel P45B (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-54:74;2998-3071\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"58:1-58:23;3078-3100\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-60:158;3102-3259\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the P45B's 70.15mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"62:1-62:462;3261-3722\"\u003e\u003cem\u003eImportant: The P45B supports a standard charge current of 4.5A (up to 13.5A on 3C fast charge), but the MC2 charges at a maximum of 0.5A per slot — a very large gap. Charging a 4500mAh high-power cell at 0.5A will take considerably longer than its rated charge time (1.5 hours at standard current) suggests, likely stretching to several hours. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"66:1-66:19;3729-3747\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"68:1-71:18;3749-3841\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:36;3749-3784\"\u003eMolicel INR21700-P45B Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:23;3785-3807\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:16;3808-3823\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:18;3824-3841\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"75:1-75:15;3848-3862\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"77:1-81:50;3864-4370\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:105;3864-3968\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:63;3969-4031\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:70;4032-4101\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:219;4102-4320\"\u003eThe P45B is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own protection circuit — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:50;4321-4370\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"85:1-85:7;4377-4383\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"87:1-88:323;4385-4769\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge Molicel P45B batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the P45B, with proper 4.2V cutoff voltage. Just be aware the charging current is dramatically lower than this cell's 4.5A standard charge rate, so a full charge will take considerably longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:245;4771-5061\"\u003e\u003cstrong\u003eQ: How does the P45B compare to the P42A?\u003c\/strong\u003e A: The P45B is the newer generation — 7% more typical capacity (4500mAh vs. 4200mAh) at the same 45A continuous discharge rating, with meaningfully lower impedance and a much stronger fast-charge capability (up to 13.5A\/3C vs. the P42A's 8.4A).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:241;5063-5376\"\u003e\u003cstrong\u003eQ: Is the P45B meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel's official documentation recommends assembling this cell into a pack with its own protection circuit. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs rather than as a casual standalone drop-in cell.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:122;5378-5552\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the P45B's length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:333;5554-5950\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a P45B on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot while the P45B is rated for 4.5A standard charging (1.5-hour charge time at that rate), expect a full charge on the MC2 to take considerably longer — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:136;5952-6140\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:90;6142-6257\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 Molicel INR21700-P45B batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454225940726,"sku":"OAS1815","price":26.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-molicel-p45b-flat-top-2pack-kit-main_3bc9f699-4fa3-4d57-9e1f-6a7f47df2bf7.webp?v=1786968776"},{"product_id":"molicel-inr21700-p45b-4500mah-45a-21700-battery-4-pack-with-nitecore-ums4-smart-charger-flagship-extreme-high-power-kit-for-professional-camera-flashes-high-end-vape-setups-performance-dr","title":"Molicel INR21700-P45B 4500mAh 45A 21700 Battery 4-Pack with Nitecore UMS4 Smart Charger – Flagship Extreme High-Power Kit for Professional Camera Flashes, High-End Setups \u0026 Performance Drone Fleets","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;169-187\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:596;189-784\"\u003eThe Molicel P45B is the newer, refined follow-up to the P42A — a 4500mAh typical capacity (7% more than the P42A) with the same 45A continuous discharge rating, but a meaningfully lower impedance and a much stronger fast-charge capability. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine Molicel INR21700-P45B batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;791-830\"\u003eMolicel INR21700-P45B Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-30:145;832-1661\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P45B (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4300mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e13.5A (60°C cutoff, 3C fast-charge capable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Impedance\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7mΩ AC (30% SOC) \/ ~15mΩ DC (50% SOC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.55mm × 70.15mm max, approx. weight 70g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top (Button Top also available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel recommends assembly in a pack with its own protection circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:244;1663-1906\"\u003e\u003cem\u003eImportant: Molicel's official documentation recommends the P45B be assembled into a pack with a proper protection circuit — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"34:1-34:182;1908-2089\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"38:1-38:30;2096-2125\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-48:95;2127-3344\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:222;2127-2348\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — still below the P45B's 4.5A standard charge current, but a meaningful step up from a basic dual-slot charger\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:109;2349-2457\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:121;2458-2578\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:202;2579-2780\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:116;2781-2896\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:88;2897-2984\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:192;2985-3176\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:73;3177-3249\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:95;3250-3344\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"52:1-52:53;3351-3403\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-54:148;3405-3552\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the Molicel P45B (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"56:1-57:33;3554-3782\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:68;3784-3851\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"63:1-63:23;3858-3880\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:369;3882-4250\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the P45B. Compared to a basic dual-slot travel charger, the UMS4's higher per-bay output (up to 3,000mA with a QC adapter on a single bay) narrows the gap to the P45B's 4.5A rated charge current considerably, though it still won't reach the cell's full rated charge speed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"67:1-67:273;4252-4524\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — a safe charging pace for four high-power cells at once, though full charges will still take a few hours given the current gap versus the P45B's rated 4.5A.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"71:1-71:19;4531-4549\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"73:1-76:18;4551-4665\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:36;4551-4586\"\u003eMolicel INR21700-P45B Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:34;4587-4620\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:27;4621-4647\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:18;4648-4665\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"80:1-80:15;4672-4686\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"82:1-86:50;4688-5199\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:105;4688-4792\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:63;4793-4855\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:75;4856-4930\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:219;4931-5149\"\u003eThe P45B is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own protection circuit — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"86:1-86:50;5150-5199\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"90:1-90:7;5206-5212\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:336;5214-5616\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge Molicel P45B batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P45B cells, with real-time monitoring on its LCD display. Its per-bay output is still below the P45B's full 4.5A rated charge current, but it charges these cells considerably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:245;5618-5908\"\u003e\u003cstrong\u003eQ: How does the P45B compare to the P42A?\u003c\/strong\u003e A: The P45B is the newer generation — 7% more typical capacity (4500mAh vs. 4200mAh) at the same 45A continuous discharge rating, with meaningfully lower impedance and a much stronger fast-charge capability (up to 13.5A\/3C vs. the P42A's 8.4A).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:241;5910-6223\"\u003e\u003cstrong\u003eQ: Is the P45B meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel's official documentation recommends assembling this cell into a pack with its own protection circuit. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs rather than as a casual standalone drop-in cell.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:188;6225-6466\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:123;6468-6644\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the P45B without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:173;6646-6870\"\u003e\u003cstrong\u003eQ: How do I know if a P45B battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:96;6872-7030\"\u003e\u003cstrong\u003eQ: Can I power the UMS4 with a power bank while traveling?\u003c\/strong\u003e A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"113:1-114:106;7032-7163\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 Molicel INR21700-P45B batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454225973494,"sku":"OAS1816","price":98.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-molicel-p45b-flat-top-4pack-kit-main_567f0d8d-78a2-453a-a810-3b317fadee2b.webp?v=1786968782"},{"product_id":"molicel-inr21700-p45b-4500mah-45a-21700-battery-6-pack-with-nitecore-ums4-ui1-chargers-flagship-extreme-high-output-power-system-for-professional-film-sets-performance-drone-fleets-comp","title":"Molicel INR21700-P45B 4500mAh 45A 21700 Battery 6-Pack with Nitecore UMS4 \u0026 Ui1 Chargers – Flagship Extreme High-Output Power System for Professional Film Sets, Performance Drone Fleets \u0026 Competitive RC Events","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;181-199\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:737;201-937\"\u003eThe Molicel P45B is the newer, refined follow-up to the P42A — a 4500mAh typical capacity (7% more than the P42A) with the same 45A continuous discharge rating, but a meaningfully lower impedance and a much stronger fast-charge capability. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine Molicel INR21700-P45B batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;944-983\"\u003eMolicel INR21700-P45B Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-30:145;985-1814\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P45B (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4300mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e13.5A (60°C cutoff, 3C fast-charge capable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Impedance\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7mΩ AC (30% SOC) \/ ~15mΩ DC (50% SOC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.55mm × 70.15mm max, approx. weight 70g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top (Button Top also available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel recommends assembly in a pack with its own protection circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:244;1816-2059\"\u003e\u003cem\u003eImportant: Molicel's official documentation recommends the P45B be assembled into a pack with a proper protection circuit — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"34:1-34:182;2061-2242\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"38:1-38:46;2249-2294\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"40:1-40:44;2296-2339\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"41:1-47:73;2340-3248\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:202;2340-2541\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the closest match here to the P45B's 4.5A standard charge current, though still below it\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:76;2542-2617\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:147;2618-2764\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:116;2765-2880\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:103;2881-2983\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:192;2984-3175\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:73;3176-3248\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"49:1-49:47;3250-3296\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"50:1-54:136;3297-3766\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:126;3297-3422\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:62;3423-3484\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:83;3485-3567\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:63;3568-3630\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"54:1-54:136;3631-3766\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"58:1-58:37;3773-3809\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-63:56;3811-4258\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the Molicel P45B (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-67:55;4260-4641\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the Molicel P45B (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"71:1-71:23;4648-4670\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"73:1-73:568;4672-5239\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the P45B without any adapter, and the UI1's slot fits the same length range. Given this is a high-power cell with a demanding 4.5A rated charge current, neither charger will match the P45B's full rated charge speed, but the UMS4 (up to 3,000mA on a single occupied bay) gets meaningfully closer than the UI1 (up to 1,000mA). We'd suggest running your most time-sensitive cells through the UMS4 and treating the UI1 as a slower backup for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"77:1-77:19;5246-5264\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"79:1-83:19;5266-5421\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:36;5266-5301\"\u003eMolicel INR21700-P45B Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:34;5302-5335\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:39;5336-5374\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:28;5375-5402\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:19;5403-5421\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"87:1-87:15;5428-5442\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"89:1-93:50;5444-5962\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:105;5444-5548\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:63;5549-5611\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:82;5612-5693\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"92:1-92:219;5694-5912\"\u003eThe P45B is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own protection circuit — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"93:1-93:50;5913-5962\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"97:1-97:7;5969-5975\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:207;5977-6237\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:245;6239-6529\"\u003e\u003cstrong\u003eQ: How does the P45B compare to the P42A?\u003c\/strong\u003e A: The P45B is the newer generation — 7% more typical capacity (4500mAh vs. 4200mAh) at the same 45A continuous discharge rating, with meaningfully lower impedance and a much stronger fast-charge capability (up to 13.5A\/3C vs. the P42A's 8.4A).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:241;6531-6844\"\u003e\u003cstrong\u003eQ: Is the P45B meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel's official documentation recommends assembling this cell into a pack with its own protection circuit. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs rather than as a casual standalone drop-in cell.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:213;6846-7125\"\u003e\u003cstrong\u003eQ: Are Molicel P45B batteries safe to charge in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 automatically recognize Li-ion chemistry and apply the correct charging voltage (4.2V) and current for P45B cells — though neither will reach the cell's full 4.5A rated charge speed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"111:1-112:102;7127-7278\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the P45B without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"114:1-115:299;7280-7648\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"117:1-118:173;7650-7870\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"120:1-121:148;7872-8045\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 Molicel INR21700-P45B batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454226039030,"sku":"OAS1817","price":120.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-molicel-p45b-flat-top-6pack-system-main_3ed97850-2b0a-467f-9f7f-9edf228dc93d.webp?v=1786968787"},{"product_id":"eve-inr21700-50e-5000mah-10a-21700-battery-2-pack-with-xtar-mc2-dual-slot-charger-high-capacity-power-kit-for-long-run-camping-lights-emergency-backup-portable-power-stations","title":"EVE INR21700-50E 5000mAh 10A 21700 Battery 2-Pack with XTAR MC2 Dual-Slot Charger – High-Capacity Power Kit for Long-Run Camping Lights, Emergency Backup \u0026 Portable Power Stations","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;151-169\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:626;171-796\"\u003eThe EVE 50E is an energy-focused 21700 cell built for runtime rather than extreme current — a genuine 5000mAh capacity with a 15A maximum discharge rating, making it a strong choice for long-runtime flashlights, moderate-drain battery packs, and electric mobility modules where capacity per cell matters more than chasing peak amps. This bundle pairs 2 genuine EVE INR21700-50E batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:35;803-837\"\u003eEVE INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:116;839-1493\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (0.2C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInitial AC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e≤18mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 68g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLong-runtime flashlights, moderate-drain battery packs, electric mobility, portable power systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:185;1495-1679\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — its strength is long runtime and stable capacity in a 5000mAh-class 21700 format, not extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1681-1862\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;1869-1893\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-45:64;1895-2564\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:98;1895-1992\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:102;1993-2094\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:145;2095-2239\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:71;2240-2310\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:113;2311-2423\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:77;2424-2500\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:64;2501-2564\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"49:1-49:48;2571-2618\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"51:1-51:215;2620-2834\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the EVE 50E (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:74;2836-2909\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:23;2916-2938\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:157;2940-3096\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the 50E's 70.15mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"61:1-61:350;3098-3447\"\u003e\u003cem\u003eImportant: The 50E supports charging up to 10A, but the MC2 charges at a maximum of 0.5A per slot. Charging a 5000mAh cell at 0.5A will take considerably longer than on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"65:1-65:19;3454-3472\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"67:1-70:18;3474-3561\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:31;3474-3504\"\u003eEVE INR21700-50E Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:23;3505-3527\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:16;3528-3543\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:18;3544-3561\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"74:1-74:15;3568-3582\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"76:1-80:50;3584-4005\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:105;3584-3688\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:63;3689-3751\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:70;3752-3821\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:134;3822-3955\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices — do not use it in unauthorized or modified equipment\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:50;3956-4005\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"84:1-84:7;4012-4018\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"86:1-87:294;4020-4370\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge EVE 50E batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the 50E, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than the 50E's rated charge current, so a full charge will take longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:237;4372-4649\"\u003e\u003cstrong\u003eQ: Is the EVE 50E a high-drain cell?\u003c\/strong\u003e A: No, it's an energy-focused cell — 15A is its maximum discharge rating, and it's better suited to long-runtime flashlights, moderate-drain packs, and electric mobility applications than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:129;4651-4832\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the 50E's 70.15mm length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:320;4834-5216\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a 50E on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot and the 50E has a 5000mAh capacity, expect a full charge to take considerably longer than the 50E's rated charge current would suggest — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:136;5218-5406\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:85;5408-5518\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 EVE INR21700-50E batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226071798,"sku":"OAS1819","price":25.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-eve-50e-flat-top-2pack-kit-main_b962536d-58f5-47d4-a714-29eb543b5627.webp?v=1786968788"},{"product_id":"molicel-inr21700-p45b-4500mah-45a-21700-battery-8-pack-with-xtar-vc8-8-slot-lcd-charger-flagship-extreme-high-output-power-reserve-for-professional-production-crews-search-rescue-units","title":"Molicel INR21700-P45B 4500mAh 45A 21700 Battery 8-Pack with XTAR VC8 8-Slot LCD Charger – Flagship Extreme High-Output Power Reserve for Professional Production Crews, Search \u0026 Rescue Units \u0026 High-Intensity Field Operations","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;165-183\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:590;185-774\"\u003eThe Molicel P45B is the newer, refined follow-up to the P42A — a 4500mAh typical capacity (7% more than the P42A) with the same 45A continuous discharge rating, but a meaningfully lower impedance and a much stronger fast-charge capability. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Molicel INR21700-P45B batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:40;781-820\"\u003eMolicel INR21700-P45B Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-30:145;822-1651\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMolicel INR21700-P45B (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4300mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e45A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMaximum Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e13.5A (60°C cutoff, 3C fast-charge capable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Impedance\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e~7mΩ AC (30% SOC) \/ ~15mΩ DC (50% SOC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.55mm × 70.15mm max, approx. weight 70g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top (Button Top also available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, EVs\/PHEVs, high-drain battery pack builds — Molicel recommends assembly in a pack with its own protection circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:244;1653-1896\"\u003e\u003cem\u003eImportant: Molicel's official documentation recommends the P45B be assembled into a pack with a proper protection circuit — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"34:1-34:182;1898-2079\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"38:1-38:25;2086-2110\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-48:139;2112-3431\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:193;2112-2304\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the closest match here to the P45B's 4.5A standard charge current, though still below it\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:124;2305-2428\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:81;2429-2509\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:216;2510-2725\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:112;2726-2837\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:115;2838-2952\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:127;2953-3079\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:213;3080-3292\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:139;3293-3431\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"52:1-52:48;3438-3485\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-54:111;3487-3597\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the Molicel P45B (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"56:1-56:111;3599-3709\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:77;3711-3787\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-60:102;3789-3890\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"64:1-64:23;3897-3919\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-66:451;3921-4371\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the P45B's 70.15mm length. Given this is a high-power cell with a demanding 4.5A rated charge current, the VC8 won't match the P45B's full rated charge speed even on a single slot, but manually selecting the higher current levels (up to 3A on one slot) gets meaningfully closer than the default 0.5A-per-slot setting used when all 8 bays are occupied.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:19;4378-4396\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"72:1-75:18;4398-4510\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:36;4398-4433\"\u003eMolicel INR21700-P45B Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:23;4434-4456\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:36;4457-4492\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:18;4493-4510\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"79:1-79:15;4517-4531\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"81:1-85:50;4533-5039\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:105;4533-4637\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:63;4638-4700\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:70;4701-4770\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:219;4771-4989\"\u003eThe P45B is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own protection circuit — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:50;4990-5039\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"89:1-89:7;5046-5052\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:247;5054-5362\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge Molicel P45B batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P45B cells, with independent monitoring on each of its 8 slots — though it won't reach the cell's full 4.5A rated charge speed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:245;5364-5654\"\u003e\u003cstrong\u003eQ: How does the P45B compare to the P42A?\u003c\/strong\u003e A: The P45B is the newer generation — 7% more typical capacity (4500mAh vs. 4200mAh) at the same 45A continuous discharge rating, with meaningfully lower impedance and a much stronger fast-charge capability (up to 13.5A\/3C vs. the P42A's 8.4A).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:241;5656-5969\"\u003e\u003cstrong\u003eQ: Is the P45B meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: Molicel's official documentation recommends assembling this cell into a pack with its own protection circuit. It's built for power tools, EVs\/PHEVs, and engineered high-drain battery packs rather than as a casual standalone drop-in cell.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:108;5971-6131\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the P45B's length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:222;6133-6408\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:175;6410-6642\"\u003e\u003cstrong\u003eQ: How do I test if a P45B battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:139;6644-6853\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"112:1-113:110;6855-6990\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 Molicel INR21700-P45B batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"Molicel","offers":[{"title":"Default Title","offer_id":51454226104566,"sku":"OAS1818","price":118.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-molicel-p45b-flat-top-8pack-reserve-main_f923b676-148a-4eda-b699-c7e1ec457ee3.webp?v=1786968787"},{"product_id":"eve-inr21700-50e-5000mah-10a-21700-battery-4-pack-with-nitecore-ums4-smart-charger-high-capacity-power-kit-for-home-backup-systems-multi-device-camping-setups-portable-energy-storage","title":"EVE INR21700-50E 5000mAh 10A 21700 Battery 4-Pack with Nitecore UMS4 Smart Charger – High-Capacity Power Kit for Home Backup Systems, Multi-Device Camping Setups \u0026 Portable Energy Storage","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;163-181\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:684;183-866\"\u003eThe EVE 50E is an energy-focused 21700 cell built for runtime rather than extreme current — a genuine 5000mAh capacity with a 15A maximum discharge rating, making it a strong choice for long-runtime flashlights, moderate-drain battery packs, and electric mobility modules where capacity per cell matters more than chasing peak amps. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine EVE INR21700-50E batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:35;873-907\"\u003eEVE INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:116;909-1563\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (0.2C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInitial AC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e≤18mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 68g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLong-runtime flashlights, moderate-drain battery packs, electric mobility, portable power systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:185;1565-1749\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — its strength is long runtime and stable capacity in a 5000mAh-class 21700 format, not extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1751-1932\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:30;1939-1968\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:95;1970-3157\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:192;1970-2161\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — a much closer match to the 50E's charging needs than a basic dual-slot charger\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:109;2162-2270\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:121;2271-2391\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:202;2392-2593\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2594-2709\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:88;2710-2797\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2798-2989\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;2990-3062\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:95;3063-3157\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:53;3164-3216\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:143;3218-3360\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the EVE 50E (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-56:33;3362-3590\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:68;3592-3659\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"62:1-62:23;3666-3688\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-64:282;3690-3971\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the 50E. Unlike a basic dual-slot travel charger, the UMS4's per-bay output (up to 3,000mA with a QC adapter on a single bay) charges a large 5000mAh cell like this considerably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"66:1-66:262;3973-4234\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — a safe, reasonable pace for four large-capacity cells at once, though it will still take a few hours for a full charge given the 50E's capacity.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:19;4241-4259\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"72:1-75:18;4261-4370\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:31;4261-4291\"\u003eEVE INR21700-50E Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:34;4292-4325\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:27;4326-4352\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:18;4353-4370\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"79:1-79:15;4377-4391\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"81:1-85:50;4393-4819\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:105;4393-4497\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:63;4498-4560\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:75;4561-4635\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:134;4636-4769\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices — do not use it in unauthorized or modified equipment\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"85:1-85:50;4770-4819\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"89:1-89:7;4826-4832\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:294;4834-5189\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge EVE 50E batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50E cells, with real-time monitoring on its LCD display, and its higher per-bay output charges these large-capacity cells noticeably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:237;5191-5468\"\u003e\u003cstrong\u003eQ: Is the EVE 50E a high-drain cell?\u003c\/strong\u003e A: No, it's an energy-focused cell — 15A is its maximum discharge rating, and it's better suited to long-runtime flashlights, moderate-drain packs, and electric mobility applications than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:188;5470-5711\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:122;5713-5888\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50E without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:173;5890-6113\"\u003e\u003cstrong\u003eQ: How do I know if a 50E battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:96;6115-6273\"\u003e\u003cstrong\u003eQ: Can I power the UMS4 with a power bank while traveling?\u003c\/strong\u003e A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:101;6275-6401\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 EVE INR21700-50E batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226137334,"sku":"OAS1820","price":97.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-eve-50e-flat-top-4pack-kit-main_f19d6932-89c9-44da-be5b-12d6f2804490.webp?v=1786968794"},{"product_id":"eve-inr21700-50e-5000mah-10a-21700-battery-6-pack-with-nitecore-ums4-ui1-chargers-high-capacity-power-system-for-off-grid-family-camping-rv-fleet-power-management-multi-device-energy-st","title":"EVE INR21700-50E 5000mAh 10A 21700 Battery 6-Pack with Nitecore UMS4 \u0026 Ui1 Chargers – High-Capacity Power System for Off-Grid Family Camping, RV Fleet Power Management \u0026 Multi-Device Energy Storage","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;175-193\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:825;195-1019\"\u003eThe EVE 50E is an energy-focused 21700 cell built for runtime rather than extreme current — a genuine 5000mAh capacity with a 15A maximum discharge rating, making it a strong choice for long-runtime flashlights, moderate-drain battery packs, and electric mobility modules where capacity per cell matters more than chasing peak amps. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine EVE INR21700-50E batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:35;1026-1060\"\u003eEVE INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:116;1062-1716\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (0.2C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInitial AC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e≤18mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 68g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLong-runtime flashlights, moderate-drain battery packs, electric mobility, portable power systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:185;1718-1902\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — its strength is long runtime and stable capacity in a 5000mAh-class 21700 format, not extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1904-2085\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:46;2092-2137\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"39:1-39:44;2139-2182\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"40:1-46:73;2183-3068\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:179;2183-2361\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the fastest way here to charge a large-capacity cell like the 50E\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:76;2362-2437\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:147;2438-2584\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:116;2585-2700\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:103;2701-2803\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:192;2804-2995\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:73;2996-3068\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"48:1-48:47;3070-3116\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"49:1-53:136;3117-3586\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:126;3117-3242\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:62;3243-3304\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:83;3305-3387\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:63;3388-3450\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"53:1-53:136;3451-3586\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"57:1-57:37;3593-3629\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-62:56;3631-4073\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the EVE 50E (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-66:55;4075-4451\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the EVE 50E (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"70:1-70:23;4458-4480\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"72:1-72:483;4482-4964\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 50E without any adapter, and the UI1's slot fits the same length range. Since the 50E has a large 5000mAh capacity, charging speed does matter here: the UMS4 (up to 3,000mA on a single occupied bay) charges noticeably faster than the UI1 (up to 1,000mA), so we'd suggest running your most time-sensitive cells through the UMS4 and using the UI1 for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"76:1-76:19;4971-4989\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"78:1-82:19;4991-5141\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:31;4991-5021\"\u003eEVE INR21700-50E Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:34;5022-5055\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:39;5056-5094\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:28;5095-5122\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:19;5123-5141\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"86:1-86:15;5148-5162\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"88:1-92:50;5164-5597\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"88:1-88:105;5164-5268\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:63;5269-5331\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:82;5332-5413\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:134;5414-5547\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices — do not use it in unauthorized or modified equipment\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"92:1-92:50;5548-5597\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"96:1-96:7;5604-5610\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:207;5612-5872\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:237;5874-6151\"\u003e\u003cstrong\u003eQ: Is the EVE 50E a high-drain cell?\u003c\/strong\u003e A: No, it's an energy-focused cell — 15A is its maximum discharge rating, and it's better suited to long-runtime flashlights, moderate-drain packs, and electric mobility applications than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:101;6153-6303\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the 50E without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:402;6305-6776\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge — with a 5000mAh cell like the 50E, it will take noticeably longer to fill on the UI1 than on the UMS4.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:173;6778-6998\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"113:1-114:143;7000-7168\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 EVE INR21700-50E batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226170102,"sku":"OAS1821","price":120.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-eve-50e-flat-top-6pack-system-main_edbd2e75-9f96-40a2-b7c3-563aeb95e457.webp?v=1786968798"},{"product_id":"eve-50e-5000mah-21700-battery-8-pack-with-xtar-vc8-charger","title":"EVE 50E 5000mAh 21700 Battery 8-Pack with XTAR VC8 Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;159-177\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:678;179-856\"\u003eThe EVE 50E is an energy-focused 21700 cell built for runtime rather than extreme current — a genuine 5000mAh capacity with a 15A maximum discharge rating, making it a strong choice for long-runtime flashlights, moderate-drain battery packs, and electric mobility modules where capacity per cell matters more than chasing peak amps. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine EVE INR21700-50E batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:35;863-897\"\u003eEVE INR21700-50E Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-29:116;899-1553\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-50E (Flat Top)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e5000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4900mAh (0.2C discharge)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInitial AC Impedance (1kHz)\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e≤18mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, energy-focused\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 68g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLong-runtime flashlights, moderate-drain battery packs, electric mobility, portable power systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"31:1-31:185;1555-1739\"\u003e\u003cem\u003eNote: This is an energy\/runtime-focused cell, not a high-drain one — its strength is long runtime and stable capacity in a 5000mAh-class 21700 format, not extreme continuous current.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"33:1-33:182;1741-1922\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"37:1-37:25;1929-1953\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-47:139;1955-3251\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:170;1955-2124\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the fastest way here to charge a large-capacity cell like the 50E\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:124;2125-2248\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:81;2249-2329\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:216;2330-2545\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:112;2546-2657\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:115;2658-2772\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:127;2773-2899\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:213;2900-3112\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"47:1-47:139;3113-3251\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"51:1-51:48;3258-3305\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"53:1-53:106;3307-3412\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the EVE 50E (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"55:1-55:111;3414-3524\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:77;3526-3602\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"59:1-59:102;3604-3705\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"63:1-63:23;3712-3734\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:536;3736-4271\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the 50E's 70.15mm length. Since the 50E has a large 5000mAh capacity, charging speed matters here: with all 8 slots occupied, the VC8 defaults to a gentler 0.5A per slot, which will take a while to fully charge a set of large-capacity cells. If you're in a hurry, manually selecting the higher current levels (up to 3A on a single slot) will charge individual cells noticeably faster, at the cost of fewer slots charging simultaneously.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:19;4278-4296\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"71:1-74:18;4298-4405\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:31;4298-4328\"\u003eEVE INR21700-50E Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:23;4329-4351\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:36;4352-4387\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4388-4405\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:15;4412-4426\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:50;4428-4849\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4428-4532\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:63;4533-4595\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:70;4596-4665\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:134;4666-4799\"\u003eThe 50E is an unprotected cell intended for compatible, purpose-built devices — do not use it in unauthorized or modified equipment\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;4800-4849\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:7;4856-4862\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:182;4864-5102\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge EVE 50E batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 50E cells, with independent monitoring on each of its 8 slots.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:237;5104-5381\"\u003e\u003cstrong\u003eQ: Is the EVE 50E a high-drain cell?\u003c\/strong\u003e A: No, it's an energy-focused cell — 15A is its maximum discharge rating, and it's better suited to long-runtime flashlights, moderate-drain packs, and electric mobility applications than to devices demanding extreme continuous current.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:115;5383-5550\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the 50E's 70.15mm length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:222;5552-5827\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:175;5829-6060\"\u003e\u003cstrong\u003eQ: How do I test if a 50E battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:139;6062-6271\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:105;6273-6403\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 EVE INR21700-50E batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226235638,"sku":"OAS1822","price":120.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-eve-50e-flat-top-8pack-pack-main_4207518d-2d41-4318-b269-4b48efb2361e.webp?v=1786968798"},{"product_id":"eve-40pl-4000mah-70a-21700-battery-2-pack-with-xtar-mc2-charger","title":"EVE 40PL 4000mAh 70A 21700 Battery 2-Pack with XTAR MC2 Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;161-179\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:591;181-771\"\u003eThe EVE 40PL is a tabless 21700 cell engineered specifically to minimize internal impedance and maximize power output — a 4000mAh capacity backed by a genuine 70A continuous discharge rating (with thermal cutoff at 80°C), putting it among the most aggressive high-power 21700 cells on the market. This bundle pairs 2 genuine EVE INR21700-40PL batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;778-813\"\u003eEVE INR21700-40PL Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:114;815-1540\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-40PL (Flat Top, Tabless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Standard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e70A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Design\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTabless construction, engineered to reduce internal impedance and increase power output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 67g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, garden equipment, electric two-wheelers, custom high-drain battery pack assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:265;1542-1806\"\u003e\u003cem\u003eImportant: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and appropriate BMS\/PCB protection — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1808-1989\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:25;1996-2020\"\u003eThe Charger: XTAR MC2\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"38:1-44:64;2022-2691\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:98;2022-2119\"\u003e\n\u003cstrong\u003eUSB-C input\u003c\/strong\u003e: DC 5V\/1A, works with USB wall adapters, power banks, laptops, and car chargers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:102;2120-2221\"\u003e\n\u003cstrong\u003eDual independent charging slots\u003c\/strong\u003e: charge two batteries simultaneously with individual monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:145;2222-2366\"\u003e\n\u003cstrong\u003eIntelligent current adjustment\u003c\/strong\u003e: automatically sets charging current to 0.5A×2 (with a 5V\/1A source) or 0.25A×2 (with a lower-power source)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:71;2367-2437\"\u003e\n\u003cstrong\u003e0V Activation\u003c\/strong\u003e: helps recover batteries that have over-discharged\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:113;2438-2550\"\u003e\n\u003cstrong\u003eMultiple safety protections\u003c\/strong\u003e: reverse-polarity protection, short-circuit protection, temperature monitoring\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:77;2551-2627\"\u003e\n\u003cstrong\u003eCompatible with protected 20700\/21700 cells\u003c\/strong\u003e (current USB-C generation)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:64;2628-2691\"\u003e\n\u003cstrong\u003eUltra-compact \u0026amp; lightweight\u003c\/strong\u003e: just 24g, 92mm × 40mm × 32mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"48:1-48:48;2698-2745\"\u003eXTAR MC2 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"50:1-50:216;2747-2962\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion batteries\u003c\/strong\u003e, including the EVE 40PL (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:74;2964-3037\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e ≤120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"56:1-56:23;3044-3066\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:158;3068-3225\"\u003eThe MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the 40PL's 70.15mm length, including its Flat Top terminal.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"60:1-60:422;3227-3648\"\u003e\u003cem\u003eImportant: High-power tabless cells like the 40PL are typically designed for fast charging in engineered packs, but the MC2 charges at a conservative maximum of 0.5A per slot. A full charge at that rate will take considerably longer than on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary charger for these cells.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"64:1-64:19;3655-3673\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"66:1-69:18;3675-3763\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"66:1-66:32;3675-3706\"\u003eEVE INR21700-40PL Battery × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"67:1-67:23;3707-3729\"\u003eXTAR MC2 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"68:1-68:16;3730-3745\"\u003eUSB Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"69:1-69:18;3746-3763\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"73:1-73:15;3770-3784\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"75:1-79:50;3786-4292\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"75:1-75:105;3786-3890\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"76:1-76:63;3891-3953\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:70;3954-4023\"\u003eCharge only with a genuine, compatible charger such as the XTAR MC2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:219;4024-4242\"\u003eThe 40PL is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS\/PCB protection — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:50;4243-4292\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"83:1-83:7;4299-4305\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"85:1-86:325;4307-4689\"\u003e\u003cstrong\u003eQ: Can the XTAR MC2 charge EVE 40PL batteries safely?\u003c\/strong\u003e A: Yes, the MC2 correctly detects and charges 3.6V\/3.7V Li-ion cells including 21700s like the 40PL, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than what this high-power cell is designed to accept, so a full charge will take considerably longer than it would on a high-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"88:1-89:278;4691-5041\"\u003e\u003cstrong\u003eQ: Is the 40PL meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and BMS\/PCB protection, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, electric two-wheelers, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"91:1-92:283;5043-5372\"\u003e\u003cstrong\u003eQ: What does \"tabless\" mean for this cell?\u003c\/strong\u003e A: Tabless construction connects the electrode foil directly around the full circumference of the cell rather than through a narrow tab, which significantly reduces internal resistance and lets the cell handle much higher continuous current — a big part of why the 40PL reaches 70A.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"94:1-95:122;5374-5548\"\u003e\u003cstrong\u003eQ: Will a 21700 battery actually fit in the MC2?\u003c\/strong\u003e A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the 40PL's length comfortably.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:285;5550-5898\"\u003e\u003cstrong\u003eQ: How long will it take to fully charge a 40PL on the MC2?\u003c\/strong\u003e A: Since the MC2 charges at up to 0.5A per slot, expect a full charge to take considerably longer than it would on a dedicated high-current charger — likely several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:136;5900-6088\"\u003e\u003cstrong\u003eQ: Can I charge both batteries at the same time?\u003c\/strong\u003e A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:86;6090-6201\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 2 EVE INR21700-40PL batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226268406,"sku":"OAS1823","price":26.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-mc2-eve-40pl-flat-top-2pack-kit-main_45fe026d-8601-4ec8-a33d-eaa5f2ac4dcf.webp?v=1786968799"},{"product_id":"eve-40pl-4000mah-70a-21700-battery-4-pack-with-nitecore-ums4-charger","title":"EVE 40PL 4000mAh 70A 21700 Battery 4-Pack with Nitecore UMS4 Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;173-191\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:649;193-841\"\u003eThe EVE 40PL is a tabless 21700 cell engineered specifically to minimize internal impedance and maximize power output — a 4000mAh capacity backed by a genuine 70A continuous discharge rating (with thermal cutoff at 80°C), putting it among the most aggressive high-power 21700 cells on the market. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine EVE INR21700-40PL batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;848-883\"\u003eEVE INR21700-40PL Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:114;885-1610\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-40PL (Flat Top, Tabless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Standard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e70A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Design\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTabless construction, engineered to reduce internal impedance and increase power output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 67g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, garden equipment, electric two-wheelers, custom high-drain battery pack assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:265;1612-1876\"\u003e\u003cem\u003eImportant: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and appropriate BMS\/PCB protection — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1878-2059\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:30;2066-2095\"\u003eThe Charger: NITECORE UMS4\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"38:1-46:95;2097-3339\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:247;2097-2343\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter — the fastest option here for this high-power cell, though still conservative compared to what an engineered fast charger could deliver\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:109;2344-2452\"\u003e\n\u003cstrong\u003eQC Mode output\u003c\/strong\u003e: 3,000mA×1 \/ 2,000mA×2 \/ 1,000mA×4 — \u003cstrong\u003eStandard Mode\u003c\/strong\u003e: 2,000mA×1 \/ 1,000mA×2 \/ 500mA×4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:121;2453-2573\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor up to 4 batteries separately, with each bay unaffected by the others\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:202;2574-2775\"\u003e\n\u003cstrong\u003eDetailed real-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:116;2776-2891\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:88;2892-2979\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:192;2980-3171\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:73;3172-3244\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:95;3245-3339\"\u003e\n\u003cstrong\u003eUniversal power input\u003c\/strong\u003e: works with wall adapters, power banks, and solar panels via USB-C\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"50:1-50:53;3346-3398\"\u003eNITECORE UMS4 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:144;3400-3543\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries\u003c\/strong\u003e, including the EVE 40PL (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-55:33;3545-3773\"\u003eIMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"57:1-57:68;3775-3842\"\u003e\u003cstrong\u003eOutput current:\u003c\/strong\u003e up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"61:1-61:23;3849-3871\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-63:365;3873-4237\"\u003eThe UMS4 uses spring-loaded contacts and its bays are sized to comfortably fit 21700 cells like the 40PL. Its higher per-bay output (up to 3,000mA with a QC adapter on a single bay) charges this high-power cell noticeably faster than a basic dual-slot travel charger, though it's still more conservative than what a dedicated engineered fast charger could deliver.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"65:1-65:239;4239-4477\"\u003e\u003cem\u003eNote: With all 4 bays occupied, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode) — a safe, steady pace for four high-power cells at once, though full charges will still take a few hours at these currents.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:19;4484-4502\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"71:1-74:18;4504-4614\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:32;4504-4535\"\u003eEVE INR21700-40PL Battery × 4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:34;4536-4569\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:27;4570-4596\"\u003eUSB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"74:1-74:18;4597-4614\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"78:1-78:15;4621-4635\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"80:1-84:50;4637-5148\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:105;4637-4741\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:63;4742-4804\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:75;4805-4879\"\u003eCharge only with a genuine, compatible charger such as the NITECORE UMS4\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:219;4880-5098\"\u003eThe 40PL is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS\/PCB protection — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"84:1-84:50;5099-5148\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"88:1-88:7;5155-5161\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"90:1-91:259;5163-5484\"\u003e\u003cstrong\u003eQ: Can the NITECORE UMS4 charge EVE 40PL batteries safely?\u003c\/strong\u003e A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 40PL cells, with real-time monitoring on its LCD display, and it charges these cells considerably faster than a basic low-current charger.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"93:1-94:278;5486-5836\"\u003e\u003cstrong\u003eQ: Is the 40PL meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and BMS\/PCB protection, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, electric two-wheelers, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"96:1-97:283;5838-6167\"\u003e\u003cstrong\u003eQ: What does \"tabless\" mean for this cell?\u003c\/strong\u003e A: Tabless construction connects the electrode foil directly around the full circumference of the cell rather than through a narrow tab, which significantly reduces internal resistance and lets the cell handle much higher continuous current — a big part of why the 40PL reaches 70A.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"99:1-100:188;6169-6410\"\u003e\u003cstrong\u003eQ: Can I charge all 4 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"102:1-103:123;6412-6588\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the UMS4?\u003c\/strong\u003e A: Yes. The UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 40PL without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"105:1-106:173;6590-6814\"\u003e\u003cstrong\u003eQ: How do I know if a 40PL battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"108:1-109:102;6816-6943\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 4 EVE INR21700-40PL batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226301174,"sku":"OAS1824","price":98.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-eve-40pl-flat-top-4pack-kit-main_25ed1e7d-1f79-4526-b90a-507b690936e9.webp?v=1786968806"},{"product_id":"eve-40pl-4000mah-70a-21700-battery-6-pack-with-nitecore-ums4-ui1-chargers","title":"EVE 40PL 4000mAh 70A 21700 Battery 6-Pack with Nitecore UMS4 \u0026 Ui1 Chargers","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;185-203\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:790;205-994\"\u003eThe EVE 40PL is a tabless 21700 cell engineered specifically to minimize internal impedance and maximize power output — a 4000mAh capacity backed by a genuine 70A continuous discharge rating (with thermal cutoff at 80°C), putting it among the most aggressive high-power 21700 cells on the market. Six of these cells need a charging setup that can keep up — at home and on the go. This bundle pairs 6 genuine EVE INR21700-40PL batteries with the NITECORE UMS4 (a 4-bay smart LCD charger for fast, monitored charging at your desk) and the NITECORE UI1 (an ultra-compact single-slot charger for travel or topping off a spare cell). Together, all 6 batteries can be charged at once — 4 in the UMS4, and the 5th and 6th staggered through the UI1 — with full visibility into every cell's health.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;1001-1036\"\u003eEVE INR21700-40PL Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:114;1038-1763\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-40PL (Flat Top, Tabless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Standard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e70A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Design\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTabless construction, engineered to reduce internal impedance and increase power output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 67g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, garden equipment, electric two-wheelers, custom high-drain battery pack assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:265;1765-2029\"\u003e\u003cem\u003eImportant: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and appropriate BMS\/PCB protection — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;2031-2212\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:46;2219-2264\"\u003eThe Chargers: NITECORE UMS4 + NITECORE UI1\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"38:1-38:44;2266-2309\"\u003eNITECORE UMS4 — 4-Bay Smart LCD Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"39:1-45:73;2310-3178\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:162;2310-2471\"\u003e\n\u003cstrong\u003eUSB-C input with QC support\u003c\/strong\u003e: up to 4,000mA total output, up to 3,000mA on a single bay with a QC adapter — the fastest option here for this high-power cell\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:76;2472-2547\"\u003e\n\u003cstrong\u003eIndependent 4-bay control\u003c\/strong\u003e: charge and monitor each battery separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:147;2548-2694\"\u003e\n\u003cstrong\u003eReal-time LCD display\u003c\/strong\u003e: shows battery health (Good\/Poor), internal resistance, charging current, voltage, charged capacity, and charging time\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:116;2695-2810\"\u003e\n\u003cstrong\u003e3 automatic charging modes\u003c\/strong\u003e: CC, CV, and -dV\/dt, selected automatically based on battery type and charge level\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:103;2811-2913\"\u003e\n\u003cstrong\u003eManual adjustment\u003c\/strong\u003e: set charging voltage and current (300mA–3000mA) for specialized battery types\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:192;2914-3105\"\u003e\n\u003cstrong\u003eSafety features\u003c\/strong\u003e: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation\/restoration\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:73;3106-3178\"\u003e\n\u003cstrong\u003eFire-retardant PC\/ABS housing\u003c\/strong\u003e with built-in temperature regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" data-sourcepos=\"47:1-47:47;3180-3226\"\u003eNITECORE UI1 — Compact Single-Slot Charger\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"48:1-52:136;3227-3696\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"48:1-48:126;3227-3352\"\u003e\n\u003cstrong\u003eType-C input\u003c\/strong\u003e: automatically adapts to the optimal charging mode, works with power banks, solar panels, and USB adapters\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"49:1-49:62;3353-3414\"\u003e\n\u003cstrong\u003eUp to 1000mA output\u003c\/strong\u003e with automatic CC\/CV mode selection\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"50:1-50:83;3415-3497\"\u003e\n\u003cstrong\u003eTrickle charging\u003c\/strong\u003e protects over-discharged cells and extends battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"51:1-51:63;3498-3560\"\u003e\n\u003cstrong\u003eOver-discharge activation\u003c\/strong\u003e for protected Li-ion batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"52:1-52:136;3561-3696\"\u003e\n\u003cstrong\u003eUltra-lightweight\u003c\/strong\u003e: just 40.5g — ideal for travel, a backup charge, or topping off the 6th cell while the UMS4 handles the other 4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"56:1-56:37;3703-3739\"\u003eSupported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-61:56;3741-4184\"\u003e\u003cstrong\u003eNITECORE UMS4\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH\/Ni-Cd batteries, including the EVE 40PL (21700) in this bundle: IMR\/Li-ion\/LiFePO4: 10440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH\/Ni-Cd: AA, AAA, AAAA, C, D Output: up to 3,000mA per bay (QC mode) \/ 4,000mA total\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"63:1-65:55;4186-4563\"\u003e\u003cstrong\u003eNITECORE UI1\u003c\/strong\u003e — compatible with 3.6V\/3.7V Li-ion\/IMR batteries, including the EVE 40PL (21700): 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 Output voltage: 4.2V±1% · Output current: up to 1000mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"69:1-69:23;4570-4592\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"71:1-71:564;4594-5157\"\u003eThe UMS4's bays and spring-loaded contacts are sized to accommodate 21700 cells like the 40PL without any adapter, and the UI1's slot fits the same length range. This is a high-power cell built for engineered fast-charging setups, so neither charger will match its full potential charge speed, but the UMS4 (up to 3,000mA on a single occupied bay) charges meaningfully faster than the UI1 (up to 1,000mA). We'd suggest running your most time-sensitive cells through the UMS4 and treating the UI1 as a slower backup for the batteries you're least in a hurry about.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"75:1-75:19;5164-5182\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"77:1-81:19;5184-5335\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"77:1-77:32;5184-5215\"\u003eEVE INR21700-40PL Battery × 6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"78:1-78:34;5216-5249\"\u003eNITECORE UMS4 4-Bay Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:39;5250-5288\"\u003eNITECORE UI1 Single-Slot Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:28;5289-5316\"\u003eUSB-C Charging Cables × 2\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:19;5317-5335\"\u003eUser Manuals × 2\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"85:1-85:15;5342-5356\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"87:1-91:50;5358-5876\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"87:1-87:105;5358-5462\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"88:1-88:63;5463-5525\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"89:1-89:82;5526-5607\"\u003eCharge only with genuine, compatible chargers such as the NITECORE UMS4 and UI1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"90:1-90:219;5608-5826\"\u003eThe 40PL is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS\/PCB protection — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"91:1-91:50;5827-5876\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"95:1-95:7;5883-5889\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"97:1-98:207;5891-6151\"\u003e\u003cstrong\u003eQ: Can I charge all 6 batteries at the same time?\u003c\/strong\u003e A: Yes. The UMS4 charges 4 batteries independently and simultaneously, while the UI1 can charge a 5th battery alongside it — or you can stagger the 5th and 6th through the UI1 if only one is used at a time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"100:1-101:278;6153-6503\"\u003e\u003cstrong\u003eQ: Is the 40PL meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and BMS\/PCB protection, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, electric two-wheelers, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"103:1-104:283;6505-6834\"\u003e\u003cstrong\u003eQ: What does \"tabless\" mean for this cell?\u003c\/strong\u003e A: Tabless construction connects the electrode foil directly around the full circumference of the cell rather than through a narrow tab, which significantly reduces internal resistance and lets the cell handle much higher continuous current — a big part of why the 40PL reaches 70A.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"106:1-107:145;6836-7043\"\u003e\u003cstrong\u003eQ: Are EVE 40PL batteries safe to charge in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 automatically recognize Li-ion chemistry and apply the correct charging voltage (4.2V) and current for 40PL cells.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"109:1-110:102;7045-7196\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit in both chargers?\u003c\/strong\u003e A: Yes. Both the UMS4 and UI1 are sized to accommodate 21700 cells like the 40PL without any adapter.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"112:1-113:299;7198-7566\"\u003e\u003cstrong\u003eQ: What's the difference between the UMS4 and UI1 in this bundle?\u003c\/strong\u003e A: The UMS4 is a 4-bay charger with an LCD screen showing detailed real-time data (battery health, internal resistance, voltage, capacity) and faster QC charging up to 3,000mA on a single bay. The UI1 is a single-slot, ultra-compact charger (40.5g) best suited for travel or a slower backup charge.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"115:1-116:173;7568-7788\"\u003e\u003cstrong\u003eQ: How do I check if a battery is degraded?\u003c\/strong\u003e A: The UMS4's LCD display shows battery health as \"Good\" or \"Poor\" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"118:1-119:144;7790-7959\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 6 EVE INR21700-40PL batteries, 1 NITECORE UMS4 charger, 1 NITECORE UI1 charger, 2 USB-C charging cables, and user manuals for both chargers.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226333942,"sku":"OAS1825","price":120.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/nitecore-ums4-ui1-eve-40pl-flat-top-6pack-system-main_49ebe58e-8c14-4b04-8bc4-011134e59520.webp?v=1786968810"},{"product_id":"eve-40pl-4000mah-70a-21700-battery-8-pack-with-xtar-vc8-charger","title":"EVE 40PL 4000mAh 70A 21700 Battery 8-Pack with XTAR VC8 Charger","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"6:1-6:19;169-187\"\u003eWhy This Bundle\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"8:1-8:643;189-831\"\u003eThe EVE 40PL is a tabless 21700 cell engineered specifically to minimize internal impedance and maximize power output — a 4000mAh capacity backed by a genuine 70A continuous discharge rating (with thermal cutoff at 80°C), putting it among the most aggressive high-power 21700 cells on the market. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine EVE INR21700-40PL batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"12:1-12:36;838-873\"\u003eEVE INR21700-40PL Specifications\u003c\/h2\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\" data-sourcepos=\"14:1-28:114;875-1600\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eItem\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eSpec\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eModel\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eEVE INR21700-40PL (Flat Top, Tabless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMinimum\/Standard Discharge Capacity\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e70A (80°C thermal cutoff)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCharge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e4.20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDischarge Cutoff Voltage\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2.5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Design\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTabless construction, engineered to reduce internal impedance and increase power output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eChemistry\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLi-ion, ultra-high-power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eCell Size\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e21700 (approx. Φ21.15mm × 70.15mm, approx. weight 67g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eFlat Top only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eProtection Circuit\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eNone (unprotected cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eTypical Use\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePower tools, garden equipment, electric two-wheelers, custom high-drain battery pack assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"30:1-30:265;1602-1866\"\u003e\u003cem\u003eImportant: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and appropriate BMS\/PCB protection — it's built as a high-power cell for engineered battery systems, not as a casual standalone consumer replacement cell.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"32:1-32:182;1868-2049\"\u003e\u003cem\u003eThis is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"36:1-36:25;2056-2080\"\u003eThe Charger: XTAR VC8\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"38:1-46:139;2082-3361\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"38:1-38:153;2082-2234\"\u003e\n\u003cstrong\u003eType-C input with QC3.0 support\u003c\/strong\u003e: up to 3A on a single bay when battery resistance is low enough — the fastest option here for this high-power cell\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"39:1-39:124;2235-2358\"\u003e\n\u003cstrong\u003e5 adjustable current levels\u003c\/strong\u003e: 3A×1 \/ 2A×2 \/ 1A×4 \/ 0.5A×8 \/ 0.25A×8 — manually selectable to match your charging needs\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"40:1-40:81;2359-2439\"\u003e\n\u003cstrong\u003e8 independent charging slots\u003c\/strong\u003e: each bay monitored and controlled separately\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"41:1-41:216;2440-2655\"\u003e\n\u003cstrong\u003eReal Capacity Test (Grading Mode)\u003c\/strong\u003e: on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"42:1-42:112;2656-2767\"\u003e\n\u003cstrong\u003eStorage Mode\u003c\/strong\u003e: charges or discharges batteries to their rated storage voltage to maximize battery lifespan\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"43:1-43:115;2768-2882\"\u003e\n\u003cstrong\u003eSmart Battery Type Detection\u003c\/strong\u003e: automatically identifies the battery and selects the optimal charging strategy\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"44:1-44:127;2883-3009\"\u003e\n\u003cstrong\u003eVA LCD Display\u003c\/strong\u003e: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"45:1-45:213;3010-3222\"\u003e\n\u003cstrong\u003eMultiple Safety Protections\u003c\/strong\u003e: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"46:1-46:139;3223-3361\"\u003e\n\u003cstrong\u003eBuilt from fire-retardant PC\/ABS material\u003c\/strong\u003e, with a built-in \"Three-Stage Lithium Battery Charging System\" (Patent No. 201720828840.6)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"50:1-50:48;3368-3415\"\u003eXTAR VC8 – Supported Battery Types \u0026amp; Voltage\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"52:1-52:107;3417-3523\"\u003e\u003cstrong\u003eCompatible with 3.6V\/3.7V Li-ion\/IMR\/INR\/ICR batteries\u003c\/strong\u003e, including the EVE 40PL (21700) in this bundle:\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"54:1-54:111;3525-3635\"\u003e10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"56:1-56:77;3637-3713\"\u003e\u003cstrong\u003eAlso compatible with 1.2V Ni-MH\/Ni-Cd batteries:\u003c\/strong\u003e AAAA, AAA, AA, A, SC, C\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"58:1-58:102;3715-3816\"\u003e\u003cstrong\u003eEnd-of-charge voltage:\u003c\/strong\u003e 4.20±0.05V (Li-ion) \/ 1.45±0.1V (NiMH) · \u003cstrong\u003eEnd-of-charge current:\u003c\/strong\u003e \u0026lt;120mA\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"62:1-62:23;3823-3845\"\u003eCompatibility Notes\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"64:1-64:444;3847-4290\"\u003eThe VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, comfortably fitting the 40PL's 70.15mm length. This is a high-power cell built for engineered fast-charging setups, so the VC8 won't match its full potential charge speed even on a single slot, but manually selecting the higher current levels (up to 3A on one slot) gets meaningfully closer than the default 0.5A-per-slot setting used when all 8 bays are occupied.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"68:1-68:19;4297-4315\"\u003eWhat's Included\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"70:1-73:18;4317-4425\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"70:1-70:32;4317-4348\"\u003eEVE INR21700-40PL Battery × 8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"71:1-71:23;4349-4371\"\u003eXTAR VC8 Charger × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"72:1-72:36;4372-4407\"\u003eUSB-A to USB-C Charging Cable × 1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"73:1-73:18;4408-4425\"\u003eUser Manual × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"77:1-77:15;4432-4446\"\u003eSafety Tips\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" data-sourcepos=\"79:1-83:50;4448-4954\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"79:1-79:105;4448-4552\"\u003eStore batteries in a proper case, keeping them away from loose metal objects to prevent short circuits\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"80:1-80:63;4553-4615\"\u003eNever disassemble, puncture, burn, or submerge the batteries\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"81:1-81:70;4616-4685\"\u003eCharge only with a genuine, compatible charger such as the XTAR VC8\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"82:1-82:219;4686-4904\"\u003eThe 40PL is an unprotected, ultra-high-power cell intended for use within a properly engineered battery pack with its own BMS\/PCB protection — do not use it as a standalone replacement cell in casual consumer devices\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\" data-sourcepos=\"83:1-83:50;4905-4954\"\u003eNever discharge below 2.5V or charge above 4.2V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" data-sourcepos=\"87:1-87:7;4961-4967\"\u003eFAQ\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"89:1-90:183;4969-5209\"\u003e\u003cstrong\u003eQ: Can the XTAR VC8 charge EVE 40PL batteries safely?\u003c\/strong\u003e A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for 40PL cells, with independent monitoring on each of its 8 slots.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"92:1-93:278;5211-5561\"\u003e\u003cstrong\u003eQ: Is the 40PL meant for use in standalone devices like flashlights?\u003c\/strong\u003e A: EVE recommends the 40PL be used in properly engineered battery packs with temperature monitoring and BMS\/PCB protection, not as a standalone drop-in cell for casual consumer devices. It's built for power tools, electric two-wheelers, and engineered high-drain battery packs.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"95:1-96:283;5563-5892\"\u003e\u003cstrong\u003eQ: What does \"tabless\" mean for this cell?\u003c\/strong\u003e A: Tabless construction connects the electrode foil directly around the full circumference of the cell rather than through a narrow tab, which significantly reduces internal resistance and lets the cell handle much higher continuous current — a big part of why the 40PL reaches 70A.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"98:1-99:108;5894-6054\"\u003e\u003cstrong\u003eQ: Will 21700 batteries fit properly in the VC8?\u003c\/strong\u003e A: Yes. The VC8 accommodates battery lengths from 32mm to 76mm, which comfortably covers the 40PL's length.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"101:1-102:222;6056-6331\"\u003e\u003cstrong\u003eQ: Can I charge all 8 batteries at the same time?\u003c\/strong\u003e A: Yes. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot. Manually selecting a higher current level (up to 3A) will use fewer slots at once but charge those cells noticeably faster.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"104:1-105:175;6333-6565\"\u003e\u003cstrong\u003eQ: How do I test if a 40PL battery has lost capacity?\u003c\/strong\u003e A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"107:1-108:139;6567-6776\"\u003e\u003cstrong\u003eQ: Does the VC8 require a special power adapter for fast charging?\u003c\/strong\u003e A: For the fastest speeds (2A\/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" data-sourcepos=\"110:1-111:106;6778-6909\"\u003e\u003cstrong\u003eQ: What's in the box?\u003c\/strong\u003e A: 8 EVE INR21700-40PL batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.\u003c\/p\u003e","brand":"EVE","offers":[{"title":"Default Title","offer_id":51454226399478,"sku":"OAS1826","price":118.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/xtar-vc8-eve-40pl-flat-top-8pack-reserve-main_9f3ce6fa-3b77-4ea9-8fdf-bae4148dfbde.webp?v=1786968810"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/collections\/21700.jpg?v=1786616676","url":"https:\/\/oneandes.com\/collections\/21700-battery-charger.oembed","provider":"OneAndes","version":"1.0","type":"link"}