{"product_id":"dmegc-3-7-volt-21700-rechargeable-battery-5000mah-battery-flat-top-21700-batteries-for-flashlight-headlamp","title":"DMEGC INR21700-50E 5000mAh 3.7V 21700 Rechargeable Li-ion Battery – 10A Continuous for LED Flashlights, Fans, Cameras \u0026 Toys","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGenuine 5000mAh with a Dependable 10A Output\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eThe DMEGC INR21700-50E is a high‑capacity 21700 cell engineered for users who demand maximum runtime from their devices without sacrificing stable voltage. With a genuine \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5000mAh capacity\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e and a verified \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e10A continuous discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, it delivers the endurance needed for all‑day fan cooling, all‑night flashlight beams, extended camera shoots, and marathon toy play sessions. The 10A output ensures that even on high settings, your devices receive steady current — no premature dimming, no sudden speed drops, just reliable, long‑lasting performance. Available in three terminal options, the 50E fits seamlessly into spring‑loaded compartments, ultra‑tight battery tubes, and custom‑welded DIY packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUnprotected, High‑Efficiency Design\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eLike most 21700 cells, the 50E is supplied as an unprotected bare cell. By omitting the external protection PCB, we keep the cell’s length at the standard 70mm (flat top) and reduce internal resistance. This means the cell fits effortlessly into any 21700‑compatible device, from enthusiast flashlights to portable fans and camera adapters. The lower resistance also allows more of the cell’s energy to reach your device and less to be dissipated as heat — a critical advantage when running at 10A for extended periods. In return, you simply pair the cell with a quality charger that stops at exactly 4.2V and install it only in devices that have built‑in low‑voltage cutoff. Almost every modern LED light, USB‑rechargeable fan, camera accessory, and electronic toy already incorporates this protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThree Terminal Choices — One Perfect Fit\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eBecause no single terminal style fits every gadget, we offer three distinct options:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e A raised positive nipple (~1.5mm) that locks securely into spring‑loaded battery compartments and passes mechanical reverse‑polarity guards. Ideal for many consumer flashlights, fan holders, and toy battery trays.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e A completely flush positive terminal. This is mandatory for ultra‑tight flashlight tubes, devices with pogo‑pin contacts, and custom spot‑welded battery packs. Many high‑end lights (ZebraLight, Noctigon, etc.) and camera accessories specifically require flat‑top cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNickel Tab:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Both positive and negative ends come pre‑welded with pure nickel strips, ready for soldering or additional spot welding. The turn‑key solution for building high‑capacity power banks, 2S\/3S packs for toys, or replacement cells for cordless tool 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=\"\"\u003eWhere 5000mAh and 10A Make the Difference\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eThe 50E’s 5000mAh capacity stores approximately \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e18.5 watt‑hours\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e of energy — nearly 2.5 times what a standard 2000mAh 18650 can hold. In a single‑LED flashlight on a 300‑lumen medium mode, expect over \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5 hours\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e of continuous light; on a 50‑lumen low mode, the cell illuminates an entire night — \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e12 hours or more\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. A USB desk fan on low speed spins for \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e10–12 hours\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, keeping your workspace or tent comfortable through a full shift. For camera monitors and LED video lights, the 10A discharge easily powers the steady 1–3A draw while the high capacity reduces the need for mid‑shoot battery swaps. Motorized toys and ride‑on vehicles also benefit: a 2S or 3S pack built from 50E cells provides dramatically extended playtime and consistent power.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAdvanced INR Chemistry for Long‑Term Reliability\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eUnder the nickel‑plated steel shell, DMEGC’s INR (Nickel‑Manganese‑Cobalt) chemistry delivers a stable 3.7V nominal voltage and a flat discharge curve, ensuring your devices perform consistently from fresh off the charger to nearly empty. With an internal resistance of ≤30mΩ, voltage sag at 10A is only about 0.3V — keeping your flashlight beam bright and your fan speed steady. The cell is rated for over \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e500 full charge\/discharge cycles\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e with ≥70% capacity retention, and its low self‑discharge rate means you can store a spare at 3.6–3.7V for months without significant power loss. Built‑in PTC thermistor, resealable safety vent, and CID provide multiple layers of passive protection against over‑current, over‑pressure, and short circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\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=\"\"\u003eGenuine 5000mAh High Capacity (18.5Wh)\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eUp to 2.5 times more energy than a standard 2000mAh 18650. Provides 5+ hours of flashlight medium mode, 10–12 hours of fan cooling, or weeks of standby for smart devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eVerified 10A Continuous Discharge\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eDelivers stable 10A output without voltage sag. Handles the needs of medium‑drain devices — flashlights, fans, cameras, and toys — with ease. Can pulse up to 15A for short bursts.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUnprotected, Standard 70mm Form Factor\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eFits all 21700‑compatible devices. Lower internal resistance ensures cooler operation and more efficient power delivery. Requires a quality 4.2V Li‑ion charger and device with low‑voltage cutoff.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eThree Terminal Options: Button Top, Flat Top \u0026amp; Nickel Tab\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for spring‑contact hosts. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for tight tubes and pogo‑pin devices. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNickel Tab\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for ready‑to‑weld custom battery packs. Complete compatibility across the 21700 ecosystem.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStable INR (NMC) Chemistry\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eDMEGC’s proven Nickel‑Manganese‑Cobalt formulation offers high energy density, excellent cycle stability, and reliable thermal performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLow Internal Resistance (≤30mΩ)\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eVoltage drop at 10A is only ~0.3V, keeping your devices in regulation longer and your beams brighter throughout the discharge cycle.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e500+ Cycle Life \u0026amp; Low Self‑Discharge\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eRecharge hundreds of times with minimal capacity fade. Holds its charge for months when stored at 3.6–3.7V — always ready for your next adventure or power outage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMulti‑Layered Passive Safety\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eBuilt‑in PTC thermistor, resealable safety vent, and CID protect against over‑current, over‑pressure, and internal 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=\"\"\u003eRugged Nickel‑Plated Steel Can\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eCorrosion‑resistant and drop‑resistant. Engineered to withstand the bumps, vibrations, and daily wear of portable fans, toys, cameras, and outdoor use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eTechnical Parameters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"ds-scroll-area ds-scroll-area--show-on-focus-within ds-scroll-area--enabled _1210dd7 c03cafe9\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eParameter\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eBattery Model\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDMEGC INR21700-50E\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eBattery Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e21700 Li‑ion (unprotected, bare cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNominal Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e5000mAh (18.5Wh)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNominal Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e3.7V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eFull Charge Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e4.2V ± 0.05V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDischarge Cut‑off Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2.5V (use only with low‑voltage protected devices)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eStandard Charge Current\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2.5A (0.5C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e10A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (2C) — verified for medium‑drain applications\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Pulse Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e15A (\u0026lt;5 seconds)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eInternal Resistance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≤30mΩ (AC 1kHz, bare cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eProtection Circuit\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eNone\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e — requires external over‑discharge protection\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003ePositive Terminal Options\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (raised ~1.5mm) \/ \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (flush) \/ \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNickel Tab\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (pre‑welded nickel strips)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDimensions (Button Top)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 21.4mm dia. × 71.0mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDimensions (Flat Top)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 21.4mm dia. × 70.0mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDimensions (Nickel Tab)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 21.4mm dia. × 70.0mm + nickel strip protrusions\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (Button Top)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 70g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (Flat Top)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 69g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (Nickel Tab)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 70g (including nickel strips)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCycle Life\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≥500 cycles (≥70% initial capacity at 0.5C charge\/discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eOperating Temp. (Charge)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e0°C to 45°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eOperating Temp. (Discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e-20°C to 60°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eStorage Temp. \u0026amp; Humidity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e-5°C to 35°C, \u0026lt;75% RH (recommend 3.6–3.7V storage)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eChemistry\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eINR (Lithium Nickel Manganese Cobalt Oxide — NMC)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e1. LED Flashlights \u0026amp; EDC Torches\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003ePop this 5000mAh cell into any 21700‑compatible flashlight and enjoy runtime that lasts from dusk to dawn. On medium mode, it delivers 5+ hours of steady light; on low, it runs all night. The 10A discharge easily handles turbo modes without triggering premature step‑down. Flat top fits ultra‑tight enthusiast tubes; button top locks securely in spring‑loaded hosts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2. Portable Fans for All‑Day Cooling\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eUSB desk fans, camping fans, and job‑site fans run effortlessly on this cell. Low speed gives 10–12 hours of gentle breeze; high speed stays strong thanks to the stable 10A output. The flat top is often required for recessed fan battery bays.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3. Camera Monitors, Video Lights \u0026amp; Accessories\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eExternal field monitors, LED panels, and camera battery adapters that accept 21700 cells benefit from the massive 5000mAh capacity. Fewer battery swaps mean uninterrupted shooting. Many camera adapters require flat‑top cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e4. Motorized Toys \u0026amp; Ride‑On Vehicles\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eUpgrade your child’s RC car, robot, or ride‑on toy with a 2S or 3S pack built from these cells. The 5000mAh capacity dramatically extends playtime, and the 10A discharge provides the current needed for startup surges and sustained driving.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5. DIY Battery Packs \u0026amp; Power Banks\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eThe nickel tab variant is ready for spot welding into custom 2S, 3S, or 4S configurations. Build a high‑capacity USB‑C power bank, a portable Bluetooth speaker battery, or a backup power station. Consistent 5000mAh per cell simplifies cell matching.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e6. Surveillance \u0026amp; Smart Home Devices\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eWireless outdoor cameras, trail cameras, and motion‑activated lights can run for weeks or months on a single charge. The low self‑discharge ensures the battery stays ready during long idle periods.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e7. Portable Medical \u0026amp; Industrial Equipment\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eHandheld scanners, portable nebulizers, and thermal printers that rely on 21700 power appreciate the combination of long runtime and stable 10A output, ensuring reliable operation through extended shifts.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ1: Is the DMEGC INR21700-50E really 5000mAh?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. This cell uses high‑density INR electrodes to deliver a genuine 5000mAh. DMEGC is a major cell manufacturer, and the 50E series is widely used in power banks, e‑bikes, and other high‑capacity applications. You can verify the capacity with any analyzing charger.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ2: Can this cell deliver 15A? I see \"3C\" on some listings.\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: The cell is rated for \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e10A continuous discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. The “3C” figure (15A) often quoted is the \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003emaximum pulse discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e — suitable only for very short bursts of a few seconds. We state the honest continuous rating so you can trust what you’re buying. For applications needing 15A+ continuously, we recommend high‑drain cells like the EVE 40P or Samsung 40T.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: Why is this battery unprotected? Is it safe for my flashlight?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Removing the protection PCB keeps the cell at the standard 70mm length and reduces internal resistance, which is essential for efficient 10A operation. It’s completely safe when used correctly: charge only with a dedicated 4.2V Li‑ion charger, and install only in devices with built‑in low‑voltage cutoff — a standard feature in modern flashlights, USB fans, cameras, and toys. The cell includes PTC, vent, and CID for passive protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: Which terminal should I choose — Button Top, Flat Top, or Nickel Tab?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for devices with spring‑loaded positive contacts and reverse‑polarity rings. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for tight tubes and pogo‑pin\/flat PCB contacts (common in enthusiast flashlights and many camera adapters). \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNickel Tab\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e if you’re building a spot‑welded battery pack. Check your device manual or measure the battery compartment if unsure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: Will this battery fit in a device designed for 18650?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: No. A 21700 cell (21mm × 70mm) is both wider and longer than an 18650 (18mm × 65mm). Your device must explicitly support the 21700 form factor. Never force a 21700 into an 18650 tube.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ6: How does the DMEGC 50E compare to the Samsung 50E or EVE 50E?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: All three are in the same class: 5000mAh capacity, 10A continuous discharge. Performance is very similar. DMEGC cells are widely used in OEM applications and offer excellent value. You can expect comparable runtime and cycle life across these brands.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ7: How long does it take to charge?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: At the standard charge rate of 2.5A, a fully depleted cell takes about 2.5 hours. Using a 1A charger will take approximately 5.5 hours. Always use a smart Li‑ion charger with accurate 4.2V termination.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ8: How should I store this cell when not in use?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Store it in a plastic battery case or silicone sleeve, away from metal objects and moisture. For storage longer than one month, bring the voltage to about 3.6–3.7V (roughly 50% charge). Check every 3 months and recharge if below 3.0V. Never store a fully depleted cell.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ9: Can I bring this battery on an airplane?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. At 18.5Wh, it’s well under the 100Wh IATA limit for carry‑on luggage. Insulate the terminals with tape or a plastic case and carry it in your hand luggage.\u003c\/span\u003e\u003c\/p\u003e","brand":"DMEGC","offers":[{"title":"Button Top","offer_id":51454091100406,"sku":"OAS158","price":4.98,"currency_code":"USD","in_stock":false},{"title":"Flat Top","offer_id":51454091133174,"sku":"OAS159","price":4.98,"currency_code":"USD","in_stock":false},{"title":"Nickel Tab","offer_id":51454091165942,"sku":"OAS160","price":4.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/DMEGC-21700-5000mAh-flat-top-lighting-main_13271ed8-5f92-42f1-a3a3-ae88455e6185.webp?v=1786965232","url":"https:\/\/oneandes.com\/products\/dmegc-3-7-volt-21700-rechargeable-battery-5000mah-battery-flat-top-21700-batteries-for-flashlight-headlamp","provider":"OneAndes","version":"1.0","type":"link"}