{"title":"IFR21700\/ LiFePO4 | 3.2V","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\u003eIFR21700 \/ LiFePO₄ | 3.2V Batteries – Inherently Safe, Ultra-Long Cycle Life 3.2V Cylindrical Cells\u003c\/h2\u003e\n    \u003cp\u003eWelcome to our \u003cstrong\u003eIFR21700 \/ LiFePO₄ (3.2V)\u003c\/strong\u003e collection. The IFR21700 is the \u003cstrong\u003eLithium Iron Phosphate (LiFePO₄)\u003c\/strong\u003e variant of the 21700 cylindrical format. It trades slightly lower energy density for \u003cstrong\u003eunmatched safety characteristics\u003c\/strong\u003e and \u003cstrong\u003eexceptional cycle life\u003c\/strong\u003e. With a nominal voltage of \u003cstrong\u003e3.2V\u003c\/strong\u003e (fully charged at \u003cstrong\u003e3.65V\u003c\/strong\u003e) and a typical capacity range of \u003cstrong\u003e1800mAh to 3000mAh\u003c\/strong\u003e, these cells are rated for \u003cstrong\u003e2,000 to 4,000+ full charge\/discharge cycles\u003c\/strong\u003e. IFR21700 batteries are the definitive choice for solar energy storage, medical equipment, UPS backup systems, emergency lighting, and any application where safety and total cost of ownership take precedence.\u003c\/p\u003e\n\n    \u003ch3\u003eWhat Is an IFR21700 \/ LiFePO₄ Battery?\u003c\/h3\u003e\n    \u003cp\u003eThe IFR21700 designation breaks down as follows: \u003cstrong\u003e\"I\"\u003c\/strong\u003e = built-in lithium-ion (rechargeable), \u003cstrong\u003e\"F\"\u003c\/strong\u003e = Iron (Fe, LiFePO₄ chemistry), \u003cstrong\u003e\"R\"\u003c\/strong\u003e = Round (cylindrical), and \u003cstrong\u003e\"21700\"\u003c\/strong\u003e = 21mm diameter × 70mm length. Unlike standard NMC 21700 cells, IFR21700 operates on a \u003cstrong\u003e3.2V\u003c\/strong\u003e nominal platform with a full charge voltage of \u003cstrong\u003e3.65V\u003c\/strong\u003e, requiring a dedicated LiFePO₄ charger.\u003c\/p\u003e\n\n    \u003ch3\u003eCore Advantages\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eInherently Safe – No Thermal Runaway:\u003c\/strong\u003e LiFePO₄ is the most thermally stable lithium-ion cathode material available. It passes nail penetration, overcharge, crush, and short-circuit tests \u003cstrong\u003ewithout catching fire or exploding\u003c\/strong\u003e, making it the safest choice for indoor, personal, or unattended installations.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eUltra-Long Cycle Life:\u003c\/strong\u003e Rated for \u003cstrong\u003e2,000–4,000+ full cycles\u003c\/strong\u003e (≥80% capacity retention). This translates to a service life \u003cstrong\u003e3 to 8 times longer\u003c\/strong\u003e than standard NMC 21700 cells, dramatically reducing lifetime replacement costs in stationary storage applications.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFlat Discharge Curve:\u003c\/strong\u003e Maintains a consistent \u003cstrong\u003e3.2V\u003c\/strong\u003e output throughout the majority of the discharge cycle, delivering stable voltage to your device until near-full depletion.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Performs reliably from \u003cstrong\u003e-20°C to 60°C\u003c\/strong\u003e during discharge, with excellent high-temperature tolerance unmatched by standard Li-ion. Charging range: 0°C to 45°C (select cells support -10°C charging).\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eLow Self-Discharge:\u003c\/strong\u003e Loses only \u003cstrong\u003e2–3% charge per month\u003c\/strong\u003e in storage, making IFR21700 ideal for emergency backup equipment and seasonal-use devices.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eEnvironmentally Friendly:\u003c\/strong\u003e Contains \u003cstrong\u003eno cobalt\u003c\/strong\u003e and no toxic heavy metals. LiFePO₄ is one of the most sustainable lithium-ion chemistries available.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eIFR21700 vs. NMC 21700 vs. Protected 21700\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\u003eIFR21700 \/ LiFePO₄ (This Collection)\u003c\/strong\u003e\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eNMC 21700\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eProtected 21700\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;\"\u003e\u003cstrong\u003e3.2V\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3.6V–3.7V\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3.7V (NMC core)\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\u003eFull Charge Voltage\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e3.65V ±0.05V\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4.20V ±0.05V\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4.2V (PCB cutoff 4.25V)\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\u003eDischarge Cut-off\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2.0V–2.5V (2.5V recommended)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2.5V–2.8V\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2.5V–2.9V (PCB enforced)\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\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e1800mAh – 3000mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh – 5000mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4000mAh – 5000mAh\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\u003eMax Continuous Discharge\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3A – 10A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e8A – 45A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e8A – 10A\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\u003eCycle Life\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\u003cstrong\u003e2,000–4,000+ cycles\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e500–1,000 cycles\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e500–800 cycles\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\u003eSafety Profile\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e\n\u003cstrong\u003eExcellent\u003c\/strong\u003e (inherently safe)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eGood (requires protection)\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eBuilt-in 4-layer protection\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\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSolar storage, medical, safety-critical\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHigh-energy\/power consumer \u0026amp; industrial\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eConsumer flashlights, DIY kits\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003ePopular IFR21700 \/ LiFePO₄ Cell 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;\"\u003eModel\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eBrand\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eNominal Capacity\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eContinuous Discharge\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eInternal Resistance\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eRecommended Application\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\u003eIFR21700-20E\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEVE \/ Others\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2000mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3A–5A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e≤30mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSolar street lights, emergency lighting\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\u003eIFR21700-25E\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEVE \/ Others\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2500mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3A–5A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e≤30mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eMedical devices, UPS backup\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\u003eIFR21700-30E\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEVE \/ Others\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e5A–10A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e≤25mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003ePortable energy storage, portable 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\u003eIFR21700-30HP\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEVE \/ Others\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3000mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e10A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e≤20mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eHigher drain needs, 3.2V-compatible power 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\u003eLiFePO₄ 21700 3.2V\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eCustom \/ OEM\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e1800mAh–3000mAh\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3A–10A\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e20–35mΩ\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3.2V device replacement and pack assembly\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n    \u003cp\u003e\u003cem\u003eNote: Exact specifications are listed on individual product pages.\u003c\/em\u003e\u003c\/p\u003e\n\n    \u003ch3\u003eTypical Specifications (IFR21700 \/ LiFePO₄)\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;\"\u003eSpecification\u003c\/th\u003e\n          \u003cth style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eTypical Values\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\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\u003eFull Charge Voltage\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3.65V ±0.05V\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\u003eDischarge Cut-off Voltage\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2.5V (recommended)\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;\"\u003e1800mAh – 3000mAh\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 Current\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e3A – 10A (grade dependent)\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\u003eMax Pulse Discharge Current\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e10A – 20A\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\u003eCycle Life (to 80% capacity)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e2,000 – 4,000 cycles\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\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eCharge: 0°C~45°C \/ Discharge: -20°C~60°C\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\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e20mΩ – 35mΩ\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\u003eCell Weight\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eApprox. 60–70g\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\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eDiameter 21.0mm–21.5mm × Length 70.0mm–71.0mm\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;\"\u003eWhy IFR21700 \/ LiFePO₄\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\u003eSolar Energy Storage \/ Off-Grid Systems\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4,000+ cycle life meets daily cycling; thermal safety for indoor\/outdoor installs\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\u003eUPS \/ Backup Power Systems\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eLong standby life, stable voltage, safe for unattended operation\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\u003eMedical Devices (Monitors, Infusion Pumps)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eNo fire\/explosion risk; extended service intervals reduce maintenance\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\u003eEmergency Lighting \/ Exit Signs\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eWide temperature tolerance; reliable after years of float 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;\"\u003e\u003cstrong\u003eSecurity Systems \/ Remote Sensors\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eLow self-discharge; safe for long-term, unsupervised deployment\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\u003eDIY Powerwalls \/ Home Energy Storage\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eEasy series\/parallel configuration; inherently safe chemistry\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\u003eMobility Scooters \/ Electric Wheelchairs\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSafe around users; excellent deep-cycle endurance\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\u003eRC Models (LiFePO₄-Ready)\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003eSafer alternative to LiPo; flat discharge for consistent throttle response\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\u003e12V Lead-Acid Replacement Packs\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; text-align: left; vertical-align: middle;\"\u003e4S IFR21700 yields 12.8V nominal—direct drop-in for 12V lead-acid\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003e⚠️ Critical Compatibility Warning – Not Interchangeable with 3.7V Cells\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003eIFR21700 LiFePO₄ cells are NOT drop-in replacements for standard 3.7V NMC 21700 batteries.\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eVoltage Mismatch:\u003c\/strong\u003e The nominal \u003cstrong\u003e3.2V\u003c\/strong\u003e and full charge \u003cstrong\u003e3.65V\u003c\/strong\u003e differ significantly from the 3.7V\/4.2V of NMC cells. Devices designed for 3.7V will likely shut down prematurely or operate incorrectly.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCharger Requirement:\u003c\/strong\u003e \u003cstrong\u003eUse ONLY a LiFePO₄-specific charger\u003c\/strong\u003e with a \u003cstrong\u003e3.65V\u003c\/strong\u003e cut-off voltage. Charging an IFR cell with a standard 4.2V Li-ion charger will cause irreversible overcharge damage and poses a safety hazard.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDevice Compatibility:\u003c\/strong\u003e Ensure your device is explicitly rated for or configurable to \u003cstrong\u003e3.2V LiFePO₄\u003c\/strong\u003e chemistry. Many flashlights, medical instruments, and industrial controllers offer this option.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003e\u003cem\u003eFor devices requiring 3.7V operation, please refer to our NMC 21700 or Protected 21700 collections.\u003c\/em\u003e\u003c\/p\u003e\n\n    \u003ch3\u003eWhy Choose Our IFR21700 \/ LiFePO₄ Batteries?\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eGenuine Grade-A Cells:\u003c\/strong\u003e Sourced from reputable LiFePO₄ manufacturers with full traceability. No recycled or B-stock cells.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eVerified Performance:\u003c\/strong\u003e Every batch is tested for actual capacity, internal resistance, and cycle retention. No exaggerated ratings.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eProtected Options Available:\u003c\/strong\u003e Raw cells for professional pack assembly, with optional PCM integration for consumer safety.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePrecision Cell Matching:\u003c\/strong\u003e Capacity and voltage matching services for multi-cell series packs (2S, 4S, 8S, etc.) to ensure pack consistency.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFlexible Quantities:\u003c\/strong\u003e Single-cell retail, multi-packs, and wholesale bulk pricing available.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCertified \u0026amp; Documented:\u003c\/strong\u003e CE, RoHS, UN38.3 certified. MSDS and full export documentation provided.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eTechnical Support:\u003c\/strong\u003e Expert guidance on LiFePO₄ system design, BMS selection, and charger compatibility.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003e👇👇👇 Browse the product list below to select the right \u003cstrong\u003eIFR21700 \/ LiFePO₄\u003c\/strong\u003e cell for your safety-critical, long-life application. For custom battery pack assembly or volume pricing, contact our engineering support team.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e","products":[{"product_id":"2pcs-oneandes-21700-3000mah-3-2v-lifepo4-battery-long-life-cylindrical-cell-for-solar-storage-diy-packs","title":"FEB 21700M 3.2V 3000mAh LiFePO4 Battery – 10A Discharge, 9.6Wh Energy for Portable Power Stations \u0026 Solar Lighting (2pcs)","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eProduct Description:\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eThe FEB 21700M is a premium-grade 21700 lithium iron phosphate (LiFePO4) battery engineered for reliable, long-lasting energy storage. This \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2pcs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e bundle delivers a stable 3000mAh (3.0Ah) capacity, 9.6Wh of energy, and a safe 10A continuous discharge current. With the standard 21700 form factor, it is the ideal core cell for portable power stations, solar garden lighting, DIY energy storage, and a wide range of everyday devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBuilt with advanced LiFePO4 chemistry, this battery offers superior thermal stability, an ultra-long cycle life, and enhanced safety against overcharging and short circuits. Its 3.2V nominal voltage makes it a perfect drop-in replacement for 12V lead-acid battery systems when used in a 4S configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eKey Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFEB 21700M Premium LiFePO4 Cell:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e High-quality 21700 battery from the trusted brand FEB.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3000mAh \/ 9.6Wh Capacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Provides reliable energy for extended runtimes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e10A Safe Continuous Discharge:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Delivers stable 10A output, suitable for a wide range of medium-power applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAdvanced LiFePO4 Safety Chemistry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Superior thermal stability, explosion-proof design, and enhanced protection against overcharging and short circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUltra-Long Cycle Life:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e LiFePO4 chemistry ensures an exceptionally long service life, far exceeding standard lithium-ion batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard 21700 Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Perfectly fits standard 21700 battery compartments (21mm x 70mm).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eVersatile Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ideal for portable power stations, solar lighting, DIY battery projects, and small power tools.\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=\"\"\u003eProduct Parameters:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e FEB \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21700M\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSize:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21700\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCapacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3000mAh \/ 3.0Ah\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEnergy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 9.6Wh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNominal Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFull Charge Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3.65V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eChemistry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e LiFePO4 (Lithium Iron Phosphate)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eContinuous Discharge Current:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 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=\"\"\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21mm (Diameter) x 70mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePack Quantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 2pcs\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=\"\"\u003eApplications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePortable Power Stations \u0026amp; Energy Storage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ideal core cell for building small portable power stations and DIY energy storage systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSolar Garden Lights:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Reliable, long-lasting power for outdoor solar lighting and pathway lights.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSmall Cordless Power Tools:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Provides stable power for compact drills, screwdrivers, and other DIY tools.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eOutdoor Camping Lights:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Powers high-lumen camping lanterns and headlamps for extended outdoor trips.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDIY Battery Packs:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Perfect for building custom 12.8V battery packs (4S configuration) for hobby and home projects.\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=\"\"\u003eFrequently Asked Questions (FAQ):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ1: What is the discharge current of this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: This FEB 21700M is rated for a stable 10A continuous discharge current, making it suitable for medium-power applications such as portable power stations and cordless tools.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ2: What is the advantage of LiFePO4 chemistry?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: LiFePO4 (Lithium Iron Phosphate) offers superior thermal stability, a much longer cycle life, and enhanced safety compared to standard lithium-ion batteries. It is much less prone to overheating, explosion, or fire.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: Is this battery safe for outdoor solar lights?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: Absolutely. With its stable 3.2V output and 3000mAh capacity, it is the perfect replacement for aging batteries in solar garden lights, providing reliable, long-lasting power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: How can I build a 12V battery pack with these cells?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: For a standard 12.8V system, you would connect 4 of these 3.2V cells in series (4S). Always use a BMS (Battery Management System) when building custom packs to ensure safety and balance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: What kind of charger should I use for this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: You must use a charger specifically designed for 3.2V LiFePO4 batteries with a 3.65V cut-off voltage. Do not use a standard 3.7V\/4.2V Li-ion charger.\u003c\/span\u003e\u003c\/p\u003e","brand":"FEB ","offers":[{"title":"Default Title","offer_id":51454207787254,"sku":"OAS1055","price":8.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/oneandes-21700-3000mah-2pcs-front_1375ad8f-2b24-4b5c-9d30-edcbe851ee96.webp?v=1786967963"},{"product_id":"oneandes-21700-3000mah-3-2v-lithium-iron-phosphate-2-pack-3c-9a-continuous-ideal-for-solar-backup-diy-12v-packs","title":"GPHN IFR21700-3000 3.2V 3000mAh 3C LiFePO4 Battery – 9A High-Discharge for E-Bikes \u0026 Power Stations (2-Pack)","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eProduct Description:\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eThe GPHN IFR21700-3000 is a premium-grade 21700 lithium iron phosphate (LiFePO4) battery engineered for reliable power delivery and long cycle life. This \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2-Pack\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e bundle delivers a stable 3000mAh (3.0Ah) capacity, 9.6Wh of energy, and a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3C (9A) continuous discharge current\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. With the standard 21700 form factor, it is the ideal core cell for e-bike conversions, portable power stations, DIY energy storage, and a wide range of everyday devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eBuilt with advanced LiFePO4 chemistry, this battery offers superior thermal stability, an ultra-long cycle life, and enhanced safety against overcharging and short circuits. Its 3.2V nominal voltage makes it a perfect drop-in replacement for 12V lead-acid battery systems when used in a 4S configuration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eKey Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGPHN IFR21700-3000 Premium LiFePO4 Cell:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e High-quality 21700 battery from the trusted brand GPHN (Peng Hui).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3000mAh \/ 9.6Wh Capacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Provides reliable energy for extended runtimes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3C (9A) Continuous Discharge:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Delivers stable 9A output, suitable for medium-power applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAdvanced LiFePO4 Safety Chemistry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Superior thermal stability, explosion-proof design, and enhanced protection against overcharging and short circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUltra-Long Cycle Life:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e LiFePO4 chemistry ensures an exceptionally long service life, far exceeding standard lithium-ion batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard 21700 Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Perfectly fits standard 21700 battery compartments (21mm x 70mm).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eVersatile Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ideal for e-bikes, portable power stations, solar lighting, and DIY battery projects.\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=\"\"\u003eProduct Parameters:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e GPHN\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e IFR21700-3000\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSize:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21700\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCapacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3000mAh \/ 3.0Ah\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEnergy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 9.6Wh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNominal Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFull Charge Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3.65V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eChemistry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e LiFePO4 (Lithium Iron Phosphate)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDischarge Rate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eContinuous Discharge Current:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 9A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21mm (Diameter) x 70mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePack Quantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 2-Pack\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=\"\"\u003eApplications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eElectric Bicycle \u0026amp; Scooter Conversions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Reliable power source for retrofitting e-bikes and electric scooters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePortable Power Stations \u0026amp; Energy Storage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ideal core cell for building small portable power stations and DIY energy storage systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSolar Garden Lights:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Reliable, long-lasting power for outdoor solar lighting and pathway lights.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSmall Cordless Power Tools:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Provides stable power for compact drills, screwdrivers, and other DIY tools.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDIY Battery Packs:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Perfect for building custom 12.8V battery packs (4S configuration) for hobby and home projects.\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=\"\"\u003eFrequently Asked Questions (FAQ):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ1: What is the discharge current of this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: This GPHN 21700 is rated for a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e continuous discharge, which translates to a stable \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e9A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e discharge current. This makes it suitable for e-bikes, portable power stations, and small power tools.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ2: What is the advantage of LiFePO4 chemistry?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: LiFePO4 (Lithium Iron Phosphate) offers superior thermal stability, a much longer cycle life, and enhanced safety compared to standard lithium-ion batteries. It is much less prone to overheating, explosion, or fire.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: Is this battery safe for e-bike conversions?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: Absolutely. With its 3C (9A) discharge rate and 3000mAh capacity, this cell provides stable, reliable power for small e-bike conversions. Always ensure your BMS (Battery Management System) is properly configured for 3.2V LiFePO4 cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: How can I build a 12V battery pack with these cells?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: For a standard 12.8V system, you would connect 4 of these 3.2V cells in series (4S). Always use a BMS when building custom packs to ensure safety and balance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: What kind of charger should I use for this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: You must use a charger specifically designed for 3.2V LiFePO4 batteries with a 3.65V cut-off voltage. Do not use a standard 3.7V\/4.2V Li-ion charger.\u003c\/span\u003e\u003c\/p\u003e","brand":"GPHN","offers":[{"title":"Default Title","offer_id":51454207852790,"sku":"OAS1056","price":8.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/oneandes-2pack-3c-9a-main_0e217656-be95-498b-8bdc-84241e1df1e7.webp?v=1786967963"},{"product_id":"21700-lifepo4-3000mah-3-2v-3c-cell-high-discharge-rate-lithium-iron-phosphate-for-solar-diy-12v-24v-packs","title":"21700 LiFePO4 3000mAh 3.2V 3C Cell – High Discharge Rate Lithium Iron Phosphate for Solar, DIY 12V\/24V Packs","description":"\u003ch3\u003e📝 Description\u003c\/h3\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e⚡ \u003cstrong\u003e21700 LiFePO4 3000mAh 3.2V 3C – The High‑Discharge Cell That Takes Your Solar \u0026amp; 12V\/24V Projects to the Next Level!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003eWhen your solar storage or DIY battery pack demands \u003cstrong\u003ereal current on demand\u003c\/strong\u003e, the \u003cstrong\u003e21700 3.2V 3000mAh 3C LiFePO4\u003c\/strong\u003e cell steps up. This isn’t a slow‑and‑steady energy cell; it’s a \u003cstrong\u003ehigh‑discharge\u003c\/strong\u003e workhorse that pours out a continuous \u003cstrong\u003e9 amps (3C)\u003c\/strong\u003e and bursts up to \u003cstrong\u003e15 amps (5C)\u003c\/strong\u003e — enough to start a 12V water pump, ride out an inverter surge, or keep a 24V LED floodlight blazing without a flicker of voltage sag. And it does all this while delivering the \u003cstrong\u003eabsolute safety\u003c\/strong\u003e and \u003cstrong\u003ebrutal longevity\u003c\/strong\u003e that only lithium iron phosphate can offer.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🔋 Each cell packs a genuine \u003cstrong\u003e3,000mAh\u003c\/strong\u003e (9.6Wh) at a rock‑steady 3.2V nominal. Stack four in series and you instantly have a \u003cstrong\u003e12.8V 3Ah (38.4Wh) compact battery\u003c\/strong\u003e — the perfect size for a small solar garden light array, a portable router UPS, or a lightweight camping power box. String eight together for a \u003cstrong\u003e25.6V 3Ah (76.8Wh) pack\u003c\/strong\u003e that drives 24V inverters, 3D printers, or industrial sensors. With the 3C discharge rating, you can pull \u003cstrong\u003e9A continuously\u003c\/strong\u003e from even a single 4S string — no need to parallel a dozen cells just to start your equipment.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🛡️ LiFePO4 is the only lithium chemistry that’s truly \u003cstrong\u003enon‑explosive, non‑toxic, and immune to thermal runaway\u003c\/strong\u003e. Build your battery into a wooden cabinet, a plastic toolbox, or your vehicle’s storage bay — it will never catch fire, vent gas, or leak acid. And with \u003cstrong\u003e≥2,000 deep‑cycle lifespan\u003c\/strong\u003e (to 80% capacity), this cell will still be delivering dependable power years after you’ve replaced your inverter and charge controller. Daily cycling for five years? Easy. Weekend use for a decade? No sweat.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e⚙️ Every cell is a \u003cstrong\u003egrade‑A, factory‑fresh unit\u003c\/strong\u003e with voltage and internal resistance rigorously matched before shipping. The flat‑top positive terminal is spot‑weld ready, and the robust nickel‑plated steel can is laser‑sealed against moisture and vibration. The ultra‑low internal resistance — typically \u003cstrong\u003e≤28mΩ\u003c\/strong\u003e — minimizes heat and voltage drop even when you flog it at the full 9A rate, keeping your system efficient and your pack healthy.\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🌍 From a 12V shed‑light battery that sips solar, to a 24V ham radio field pack, to a 48V powerwall built tier by tier — this 21700 3C cell is the flexible, high‑power building block you’ve been needing. Stop over‑sizing lead‑acid, stop nursing NiMH, and start building the safe, long‑life lithium system you’ve been planning.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e⭐ Key Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e⚡ \u003cstrong\u003e3C Continuous Discharge (9A) \/ 5C Pulse (15A)\u003c\/strong\u003e – True high‑rate lithium iron phosphate. Each cell delivers a full \u003cstrong\u003e9 amps continuous\u003c\/strong\u003e; bursts of \u003cstrong\u003e15 amps\u003c\/strong\u003e handle motor start‑up and inverter surges without voltage collapse.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🔋 \u003cstrong\u003eGenuine 3000mAh Capacity\u003c\/strong\u003e – Nominal 3.2V, 9.6Wh per cell. Build a 4S 12.8V 3Ah (38.4Wh) or 8S 25.6V 3Ah (76.8Wh) pack with just a handful of cells — perfect for compact solar and backup systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🔄 \u003cstrong\u003e2,000+ Ultra‑Deep Cycle Life\u003c\/strong\u003e – Retains ≥80% capacity after 2,000 full depth‑of‑discharge cycles. That’s over 5 years of daily cycling or a decade of part‑time use — dramatically outlasting lead‑acid and NiMH.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🛡️ \u003cstrong\u003eInherent LiFePO₄ Safety\u003c\/strong\u003e – No fire, no explosion, no toxic fumes. The only lithium chemistry you can confidently install indoors, in your vehicle, or in children’s educational projects.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e📉 \u003cstrong\u003eUltra‑Low Internal Resistance ≤28mΩ\u003c\/strong\u003e – Minimised heat generation and voltage sag, even under full 3C load. More stored energy goes to your appliances, not wasted as heat.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🏅 \u003cstrong\u003e100% Grade A Cells\u003c\/strong\u003e – Each cell is factory‑matched for voltage and internal resistance, with zero cycles and laser‑etched model codes. No B‑stock, no used pulls — only consistent, reliable power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e📏 \u003cstrong\u003eStandard 21700 Format\u003c\/strong\u003e – 21.5mm diameter × 70mm height. Fits all 21700 battery holders, plastic spacers, and shrink‑wrap jigs. Offers ~25% more volume than an 18650 for better heat dissipation and capacity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🔩 \u003cstrong\u003eFlat‑Top Terminal – DIY Ready\u003c\/strong\u003e – Clean positive terminal designed for spot‑welding nickel strips, soldering tabs, or pressing into spring‑loaded 21700 sleds. Build your pack your way.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🌡️ \u003cstrong\u003eAll‑Climate Operation\u003c\/strong\u003e – Discharge from -20°C to 60°C, charge from 0°C to 55°C. Reliably powers your gear in freezing winters and blazing summers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🧩 \u003cstrong\u003eModular \u0026amp; Stackable\u003c\/strong\u003e – Combine in series for 12V, 24V, 48V systems; parallel for more capacity. The 3C rating gives you both current and flexibility.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e📊 Parameters\u003c\/h3\u003e\n\u003cdiv class=\"ds-scroll-area ds-scroll-area--show-on-focus-within _1210dd7 c03cafe9\"\u003e\n\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003e21700 LiFePO₄ 3000mAh 3C Cell Specification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Type\u003c\/td\u003e\n\u003ctd\u003e21700 Cylindrical LiFePO₄\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemistry\u003c\/td\u003e\n\u003ctd\u003eLithium Iron Phosphate (LiFePO₄)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e3.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical Capacity\u003c\/td\u003e\n\u003ctd\u003e3,000mAh (0.2C discharge, 25°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Energy\u003c\/td\u003e\n\u003ctd\u003e9.6 Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Continuous Discharge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e9A (3C)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse Discharge\u003c\/td\u003e\n\u003ctd\u003e15A (5C, ≤5s)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Charge Current\u003c\/td\u003e\n\u003ctd\u003e1.5A (0.5C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Fast Charge Current\u003c\/td\u003e\n\u003ctd\u003e3A (1C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCut‑off Charging Voltage\u003c\/td\u003e\n\u003ctd\u003e3.65V ±0.05V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge Cut‑off Voltage\u003c\/td\u003e\n\u003ctd\u003e2.0V (2.5V recommended for max cycle life)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Resistance (AC 1kHz)\u003c\/td\u003e\n\u003ctd\u003e≤28mΩ (typical, matched within batch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle Life\u003c\/td\u003e\n\u003ctd\u003e≥2,000 cycles (0.5C charge\/discharge, 25°C, 80% DoD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp – Charge\u003c\/td\u003e\n\u003ctd\u003e0°C ~ 55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp – Discharge\u003c\/td\u003e\n\u003ctd\u003e-20°C ~ 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp \/ Humidity\u003c\/td\u003e\n\u003ctd\u003e-20°C ~ 35°C \/ ≤85% RH (store at 3.2‑3.3V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (Diameter × Height)\u003c\/td\u003e\n\u003ctd\u003eApprox. 21.5mm × 70mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight per Cell\u003c\/td\u003e\n\u003ctd\u003eApprox. 60‑62g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eFlat top (positive) \/ nickel‑plated steel can (negative)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, RoHS, UN38.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch3\u003e🎯 Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e☀️ \u003cstrong\u003eDIY 12V Solar Storage\u003c\/strong\u003e – A 4S pack gives you 12.8V 3Ah; add parallel strings to build a 12V 15Ah or 30Ah bank. Perfect for solar garden lights, security cameras, and small off‑grid cabins.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e⚡ \u003cstrong\u003e24V Backup \u0026amp; Inverter Systems\u003c\/strong\u003e – An 8S configuration provides 25.6V 3Ah, ideal for 24V inverters, 3D printers, ham radios, and server backup. High current delivery keeps your gear running smoothly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🚐 \u003cstrong\u003eRV \u0026amp; Camper Auxiliary Power\u003c\/strong\u003e – Replace heavy lead‑acid with a lightweight 12.8V LFP pack for interior LEDs, water pumps, and 12V fridges. Safe to install inside without venting concerns.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🛑 \u003cstrong\u003eHome Office UPS\u003c\/strong\u003e – Keep your router, modem, and VoIP phone online during blackouts with a compact 12.8V battery box. The 3C discharge easily handles the startup surge of networking gear.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🔧 \u003cstrong\u003ePortable Power Stations \u0026amp; Solar Generators\u003c\/strong\u003e – Build a silent, fume‑free power box with USB‑C PD, 12V cigarette socket, and an inverter. The high discharge rate supports power tools and small appliances.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e📡 \u003cstrong\u003eOff‑Grid Sensors \u0026amp; IoT\u003c\/strong\u003e – Pair a single cell or a small 4S pack with a solar panel for year‑round remote monitoring of weather stations, water levels, or wildlife cameras.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🚲 \u003cstrong\u003eE‑Bike Accessory \u0026amp; Lighting Packs\u003c\/strong\u003e – Construct a dedicated 8S 24V battery for powerful LED headlights, horns, and display systems. Safe enough to charge inside your apartment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e🎓 \u003cstrong\u003eSTEM Education \u0026amp; Makerspaces\u003c\/strong\u003e – The safest high‑discharge cell for university labs and DIY enthusiasts. Experiment with BMS design, pack building, and renewable energy storage without fire risk.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OneAndes","offers":[{"title":"Default Title","offer_id":51454208442614,"sku":"OAS1059","price":52.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/21700-lifepo4-3000mah-3c-single_fd0a2451-875c-4ece-ad2d-c4b5909c0942.webp?v=1786967973"},{"product_id":"64pcs-21700-3-2v-lifepo4-3200mah-3c-cells-bulk-pack-for-energy-storage-12v-24v-48v-battery-builds-high-safety","title":"ZK-IFR21700 3.2V 3200mAh 3C LiFePO4 Battery – 10.24Wh Energy, 1500+ Cycles ≥92% Retention for Bulk Power Stations \u0026 E-Bikes (64-Pack)","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eProduct Description:\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eThe ZK-IFR21700 is a premium-grade 21700 lithium iron phosphate (LiFePO4) battery engineered for high-capacity energy storage and reliable power delivery. This \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e64-Pack bulk bundle\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e delivers a high-capacity 3200mAh (3.2Ah), 10.24Wh of energy, and a stable \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3C (9.6A) continuous discharge current\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. With its standard 21700 form factor, it is the ideal core cell for large-scale battery pack assembly, e-bike conversions, and professional DIY energy storage projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWhat truly sets this battery apart is its exceptional longevity. According to the official cycle life curve, it maintains \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e≥92% capacity retention even after 1500 full cycles\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e at 1C charge\/discharge. Manufactured with advanced LiFePO4 chemistry and rigorous quality control, this cell offers superior thermal stability, an ultra-low internal resistance of ≤22mΩ, and enhanced safety against overcharging and short circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eKey Features:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHigh-Capacity 3200mAh Cell:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Delivers 10.24Wh of reliable energy for extended runtimes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3C (9.6A) Stable Discharge:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Provides a stable 9.6A continuous discharge current for medium-to-high power applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUltra-Long 1500+ Cycle Life (≥92% Retention):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Maintains over 92% of its original capacity after 1500 full cycles, providing exceptional long-term value.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUltra-Low Internal Resistance (≤22mΩ):\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ensures minimal heat generation and efficient energy transfer during heavy loads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAdvanced LiFePO4 Safety Chemistry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Superior thermal stability, explosion-proof design, and enhanced safety against overcharging and short circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWide Operating Temperature:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Supports discharging from -20°C to 60°C and charging from 0°C to 45°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=\"\"\u003eProfessional Bulk Packaging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 64 cells in bulk pack, ideal for battery pack factories, manufacturers, and large-scale energy projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eVersatile Applications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Perfect for bulk battery assembly, e-bike battery packs, solar storage, and portable power stations.\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=\"\"\u003eProduct Parameters:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e ZK\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e IFR21700\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSize:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21700\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCapacity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3200mAh \/ 3.2Ah\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEnergy:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 10.24Wh\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNominal Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFull Charge Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3.65V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDischarge Cut-off Voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 2.0V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eChemistry:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e LiFePO4 (Lithium Iron Phosphate)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDischarge Rate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge Current:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 9.6A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eInternal Resistance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e ≤22mΩ\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCycle Life:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e ≥ 1500 cycles (≥92% retention at 1C\/1C)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard Charging Current:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 1600mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMax Charging Current:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 3200mA\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eOperating Temp - Charging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 0°C to 45°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=\"\"\u003eOperating Temp - Discharging:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e -20°C to 60°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=\"\"\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 21.6mm (Diameter) x 71mm (Height)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWeight:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e ≤72g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePack Quantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e 64-Pack\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=\"\"\u003eApplications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eIndustrial Battery Pack Assembly:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Ideal core cell for factories and workshops assembling 12V, 24V, and 48V battery packs for electric vehicles and energy storage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eE-Bike \u0026amp; E-Scooter Battery Packs:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Reliable high-capacity cells for retrofitting and manufacturing electric bicycle and scooter battery systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSolar Energy Storage Systems:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Long-lasting, high-capacity energy storage for off-grid solar setups and home backup systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLarge-Capacity Portable Power Stations:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Core cell for building professional-grade portable power stations and outdoor energy supplies.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGrid \u0026amp; Telecom Backup Power:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Reliable power for industrial UPS systems, telecom backup batteries, and critical infrastructure.\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=\"\"\u003eFrequently Asked Questions (FAQ):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ1: What is the discharge current of this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA1: This ZK-IFR21700 is rated for a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3C continuous discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, which equates to a stable \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e9.6A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e discharge current (3200mAh × 3). This makes it suitable for e-bike conversions, portable power stations, and medium-power tools.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ2: What is the advantage of the 1500+ cycle life?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA2: According to the official test data, this cell maintains over \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e92% of its original capacity after 1500 full cycles at 1C charge\/discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. This is significantly higher than standard cells, offering exceptional long-term value and drastically reducing replacement costs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: Is this battery safe to use in e-bike battery packs?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA3: Absolutely. With its stable 3C (9.6A) discharge rate, high 3200mAh capacity, and ultra-long cycle life, this cell is an excellent choice for e-bike battery pack assembly. Always ensure your BMS is properly configured for 3.2V LiFePO4 cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: What is the internal resistance of this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA4: The internal resistance is \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e≤22mΩ\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, which ensures minimal heat generation and maximum energy transfer efficiency during high-load discharge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: What kind of charger should I use for this battery?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA5: You must use a charger specifically designed for 3.2V LiFePO4 batteries with a 3.65V cut-off voltage. A smart charger capable of delivering up to 3.2A (1C) is recommended for optimal charging.\u003c\/span\u003e\u003c\/p\u003e","brand":"OneAndes","offers":[{"title":"Default Title","offer_id":51454208377078,"sku":"OAS1058","price":245.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/64pcs-21700-lifepo4-3200mah-bulk_4cd3a1eb-4705-41aa-b377-9b40124eccd1.webp?v=1786967969"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/collections\/1000x234px-21700_3.2V.jpg?v=1786591742","url":"https:\/\/oneandes.com\/collections\/ifr21700-lifepo4-3-2v.oembed","provider":"OneAndes","version":"1.0","type":"link"}