{"product_id":"2-pack-3-7-volt-rechargeable-batterieslithium-battery-3500mah-for-flashlights-headlamps-doorbells-rc-carsoutdoor-garden-lights","title":"3500mAh (12.95Wh) 3.7V 18650 Li-ion Rechargeable Battery (2-Pack) – Long-Lasting Power for Flashlights, Headlamps, Fans \u0026 Outdoor Lights","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eEndurance That Keeps Up With You\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWhen your adventures span from sunset to sunrise, you need a battery that refuses to quit early. This\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2‑pack of 3500mAh 18650 cells\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003estores a massive 12.95 watt‑hours of energy per cell — nearly double what a standard 2000mAh battery can hold. It’s the definitive power upgrade for devices that must run for hours on end: the flashlight guiding you through a night hike, the headlamp illuminating your campsite, the portable fan keeping the tent comfortable, or the outdoor garden light standing guard until dawn. With two cells in the pack, you always have a fully charged spare ready to swap, doubling your total runtime and eliminating downtime.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eUnprotected, Uninhibited, Unbeatable Compatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWe deliberately leave the external protection PCB off these batteries for three good reasons: shorter length, lower internal resistance, and unfettered compatibility. The flat‑top version measures just 65.0mm, the button‑top 66.5mm — both significantly shorter than a typical protected 18650. This means they slide effortlessly into ultra‑compact flashlights, tight‑fitting fan battery bays, and outdoor light compartments that simply cannot accommodate the extra 2–3mm of a protection circuit. By removing the PCB, we also eliminate an extra layer of electrical resistance, allowing more of the stored energy to reach your device, generating less heat and maintaining voltage under load. The trade‑off is small: you must pair these cells with a quality charger that stops at exactly 4.2V, and only install them in devices that have their own built‑in low‑voltage cutoff. The vast majority of modern LED flashlights, headlamps, USB‑rechargeable fans, and outdoor solar lights already meet this requirement, making them ideal partners.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eChoose Your Connection: Button Top or Flat Top\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eTo cover every possible device, we supply both positive terminal styles. The\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ehas a raised positive nipple (~1.5mm) that locks securely into spring‑loaded battery compartments, easily passing mechanical reverse‑polarity protection rings. It’s the go‑to choice for many consumer flashlights, headlamps, and fan holders. The\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ehas a completely flush positive end, mandatory for devices with extremely tight battery tubes (where even a millimeter matters), for spot‑welding custom DIY battery packs, and for gadgets that use pogo‑pin or flat PCB contacts. Check your device manual, select the right version, and enjoy a wiggle‑free, reliable connection every time.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eWhere 3500mAh Becomes a Game‑Changer\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRated for a maximum continuous discharge of 5A (approximately 1.4C), this cell is optimized for medium‑drain, long‑runtime applications — precisely the profile of the flashlights, headlamps, fans, and outdoor lights it’s designed for. In a high‑performance LED flashlight, a single 3500mAh cell delivers over 3.5 hours of bright 300‑lumen output, or an entire night on a gentle 50‑lumen low mode. A lightweight headlamp will easily power a weekend camping trip or multiple evening runs on one charge. A portable USB fan can hum on low speed for 10–14 hours, covering two full work shifts or a sweltering night in a tent. And in a solar‑powered outdoor garden light, the 12.95Wh energy reserve stores enough daytime sun to illuminate pathways, flowerbeds, and patios from dusk until well past midnight, far outlasting the smaller 1500mAh cells often bundled with such fixtures. With two cells, you can keep one in use and one on charge — zero waiting, total peace of mind.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eBuilt for Years of Reliable Service\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eUnder the nickel‑plated steel shell, high‑density NMC chemistry maintains a stable 3.7V nominal voltage and an impressively flat discharge curve. Your light doesn’t gradually dim, your fan doesn’t slowly lose speed, and your outdoor light stays bright hour after hour. Despite the lack of an external protection IC, each cell features a built‑in\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePTC thermistor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethat suppresses over‑current spikes and a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eresealable pressure vent\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ethat releases gas under extreme thermal stress. The steel can shrugs off drops, corrosion, and daily abuse. With a cycle life exceeding 500 full charges and exceptionally low self‑discharge, you can store a spare for months at the recommended voltage, and it will wake up with most of its capacity intact — ready for the next power outage, camping trip, or backyard party.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGenuine 3500mAh High Capacity (12.95Wh per cell)\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eNearly double the energy of a 2000mAh battery. Delivers extended runtime for flashlights, headlamps, fans, and outdoor lights — fewer swaps, more doing.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2‑Pack for Uninterrupted Power\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eTwo identical cells. Keep one in your device, one fully charged in reserve. Perfect for long excursions, multi‑day trips, or high‑use scenarios.\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, Ultra‑Compact Design\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eShorter length (65.0mm flat, 66.5mm button) fits tight battery compartments that reject longer protected cells. Lower overall internal resistance means cooler operation and more power to your device.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDual Terminal Options: Button Top \u0026amp; Flat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003efor a secure click in spring‑contact devices.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003efor recessed contacts, spot‑welded packs, and space‑constrained gadgets. Full compatibility — no adapters needed.\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 NMC Chemistry \u0026amp; Flat Discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eMaintains a consistent 3.7V from 4.2V down to 2.5V. Your LED stays bright, your fan speed holds steady, and your outdoor light performs predictably.\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 (≤60mΩ)\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eMinimal voltage sag even under a 5A load. On typical 1–3A flashlight and fan draws, the drop is virtually imperceptible, maximizing usable capacity.\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; Negligible Self‑Discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eRecharge each cell over 500 times with minimal capacity loss. Store for months at 3.6–3.7V — it will still be ready for action when you need it.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBuilt‑In Passive Safety Mechanisms\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003ePTC thermistor suppresses over‑current; resealable vent prevents pressure buildup. Nickel‑plated steel can resists impact, leaks, and corrosion.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEco‑Friendly \u0026amp; Cost‑Effective\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eReplaces hundreds of disposable alkaline batteries over its lifetime. Zero memory effect allows partial top‑ups without conditioning.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eTechnical Parameters\u003c\/span\u003e\u003c\/h2\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\u003cstrong\u003e\u003cspan class=\"\"\u003eBattery Type\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e18650 Li‑ion (unprotected, bare cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNominal Capacity per Cell\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e3500mAh (12.95Wh)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePack Count\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2 cells\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNominal Voltage\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003eFull Charge Voltage\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003eDischarge Cut‑off Voltage\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard Charge Current\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e1.75A (0.5C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e5A (approx. 1.4C) — designed for medium‑drain, long‑runtime\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMax Pulse Discharge\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e7A (\u0026lt;5 seconds)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eInternal Resistance\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≤60mΩ (AC 1kHz, bare cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eProtection Circuit\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNone — requires external over‑discharge protection\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePositive Terminal Options\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eButton Top (raised ~1.5mm) or Flat Top (flush)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDimensions (Button Top)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 18.4mm dia. × 66.5mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDimensions (Flat Top)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 18.4mm dia. × 65.0mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWeight (Button Top) per cell\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 49g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWeight (Flat Top) per cell\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 48g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCycle Life per cell\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≥500 cycles (≥70% initial capacity at 0.5C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eOperating Temp. (Charge)\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003eOperating Temp. (Discharge)\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003eStorage Temp. \u0026amp; Humidity\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003eChemistry\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNMC (Lithium Nickel Manganese Cobalt Oxide)\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\u003ch2\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h2\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHigh‑Performance LED Flashlights\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eFor enthusiasts who demand maximum runtime from their EDC or tactical lights. On a 300‑lumen medium setting, one cell lasts over 3.5 hours; on a low 50‑lumen mode, it can illuminate an entire night. Flat top fits ultra‑tight ZebraLight tubes; button top locks securely into spring‑loaded hosts. Keep the spare in your pocket for instant swaps during extended night use.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHeadlamps for Extended Outdoors\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eTrail runners, backpackers, and campers will appreciate a headlamp that won’t die mid‑adventure. At a comfortable 100‑lumen setting, expect over 10 hours of hands‑free illumination. The cell’s moderate weight keeps the headlamp balanced and comfortable, even during active movement.\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 Fans for All‑Day Cooling\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eUSB‑rechargeable desk fans, camping fans, and stroller fans pair brilliantly with this high‑capacity cell. On low speed, enjoy 10–14 hours of gentle breeze — enough for two full work shifts or a night in a hot tent. On high, expect around 3–4 hours of strong airflow. The flat top is often required for recessed fan battery bays.\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 Garden \u0026amp; Path Lights\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eReplace the smaller 1500–2000mAh cells in your solar‑powered outdoor lights with these 3500mAh workhorses. They store more energy during the day, keeping your pathways, flowerbeds, and patios illuminated from dusk until well after midnight. Ensure your solar light’s charge controller has its own over‑discharge protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBackup Power \u0026amp; Emergency Kits\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eKeep a few charged cells in your go‑bag, glovebox, or power‑outage drawer. The ultra‑low self‑discharge means they’ll still be full months later, ready to power flashlights, radios, or USB chargers when the grid fails.\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 \u0026amp; Hobby Projects\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eThe flat top variant is purpose‑built for spot welding into 2S or 3S configurations for portable Bluetooth speakers, drone ground stations, or custom power banks. The high per‑cell capacity minimizes the total number of cells needed for a given energy target.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eFAQ\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ1: Is 3500mAh a true capacity? Many batteries exaggerate.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes, this cell uses high‑density NMC electrodes to achieve a genuine 3500mAh. We encourage you to test it with a professional analyzing charger — you will see close to 3500mAh discharged from 4.2V to 2.5V at a 0.2C rate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ2: Why is this battery unprotected? Is it safe for my flashlight?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: We omit the protection PCB to keep the cell short (fits more devices) and to lower internal resistance. It’s perfectly safe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ewhen used correctly\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: charge only with a dedicated 4.2V Li‑ion charger, and use only in devices that have built‑in low‑voltage cutoff (like most modern flashlights, headlamps, USB fans, and solar charge controllers). The cell includes a PTC thermistor and pressure vent for passive safety.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: How do I choose between Button Top and Flat Top?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: If your device has a spring at the positive end and a plastic ring that would block a flat terminal, you need a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. If the battery tube is very tight or the positive contact is a flat metal pad (common in ZebraLight, some fans, and welded packs), you need a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. Always consult your device manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: Can I use this battery in an RC car or high‑drain device?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: No, this is an energy‑density cell rated for a maximum continuous discharge of 5A. RC cars, power tools, and sub‑ohm typically require 10–30A or more. Using this cell in such a device could cause severe voltage sag, overheating, and damage. For high‑drain needs, please select our 10C\/20A high‑rate batteries.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: How long will a 3500mAh battery run my portable fan?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: On low speed (drawing around 0.3–0.5A), expect 10–14 hours. On high speed (1.5–2A), around 3–4 hours. With two cells in the pack, you can swap and keep the air moving continuously.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ6: How should I store the spare battery?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Store it in a plastic battery case, away from keys, coins, and moisture. For storage longer than one month, adjust the voltage to about 3.6–3.7V (roughly 50% charge). Check every 3 months and recharge if it drops 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=\"\"\u003eQ7: How many times can I recharge this battery?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Over 500 full charge\/discharge cycles while retaining at least 70% of its original capacity. For devices that are recharged once a week, that’s nearly 10 years of service.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ8: Can I bring these batteries on an airplane?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. At 12.95Wh per cell, they are well under the 100Wh IATA limit. Carry them in your hand luggage with terminals insulated (electrical tape or a plastic case). Airlines permit multiple small Li‑ion cells for personal use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ9: What charger do you recommend?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Any quality charger designed for 3.7V Li‑ion cells with accurate 4.2V termination. A basic single‑ or dual‑bay smart charger from brands like Nitecore, XTAR, or LiitoKala works perfectly. Never use a NiMH or alkaline charger.\u003c\/span\u003e\u003c\/p\u003e","brand":"DOUBLEPOW","offers":[{"title":"Button Top","offer_id":51454082187510,"sku":"5550DLP51","price":9.98,"currency_code":"USD","in_stock":true},{"title":"Flat Top","offer_id":51454082220278,"sku":"5550DLP52","price":9.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/2pack-3500mAh-lithium-battery-high-capacity-main_86169f09-cf70-4247-b726-e3ad77944da2.webp?v=1786964699","url":"https:\/\/oneandes.com\/products\/2-pack-3-7-volt-rechargeable-batterieslithium-battery-3500mah-for-flashlights-headlamps-doorbells-rc-carsoutdoor-garden-lights","provider":"OneAndes","version":"1.0","type":"link"}