{"product_id":"3-7-volt-18650-rechargeable-batteries-lithium-battery-2800mah-for-flashlights-headlamps-doorbells-rc-carsoutdoor-garden-lights","title":"2800mAh (10.4Wh) 3.7V 18650 Li-ion Battery – Long-Lasting Power for Flashlights, Headlamps, RC Cars, Toys \u0026 Garden Lights","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eThe Endurance Specialist\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eStep into the sweet spot of high-capacity 18650 performance. With 2800mAh and 10.4 watt-hours of energy, this cell bridges the gap between standard 2500mAh packs and the ultra-premium 3500mAh giants. It delivers roughly 40% more runtime than an entry-level 2000mAh battery, making it the intelligent upgrade for users who demand extended operation without jumping to the heaviest, most expensive cells. Whether you’re lighting up a trail, powering a radio-controlled car, or keeping a garden light glowing until dawn, this battery delivers dependable, long-lasting energy.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eUnprotected for Precision Fit and Pure Power\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWe deliberately left off the external protection PCB. The result is a shorter, lighter cell with a direct electrical path — crucial for high-performance devices that already manage their own safety. At just 65.0mm in the flat top version, it slips effortlessly into the tightest flashlight tubes and RC battery trays. Without the extra PCB resistance, voltage sag is minimized, and less energy is wasted as heat. Naturally, this design places responsibility in your hands: always charge with a quality Li-ion charger that terminates at exactly 4.2V, and only use the cell in devices that incorporate their own low-voltage cutoff. The vast majority of enthusiast flashlights, modern RC cars, USB fans, and smart garden lights already meet this requirement, making them ideal partners.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eYour Choice of Terminal: Button Top or Flat Top\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eEvery device is different, so we offer both 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\u003eversion features a raised positive nipple that locks securely into spring-loaded compartments and easily clears mechanical reverse-polarity guards. 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\u003eversion has a flush positive terminal, mandatory for ultra-compact flashlights with pogo-pin contacts, for building custom spot-welded battery packs, and for any application where a single extra millimeter would prevent the battery door from closing.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eWhere 2800mAh Truly Shines\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRated for a continuous discharge current of 5A, this cell is optimized for medium-drain applications — precisely where most flashlights, headlamps, RC cars, motorized toys, and garden lights operate. In a modern LED flashlight, expect around 3 hours of bright 300-lumen output, or a full night on a gentle low mode. A lightweight headlamp can easily power a weekend camping trip on one charge. A hobby-grade RC car will tear around the track for noticeably longer before a battery swap. Motorized toys — action figures, robots, building kits — keep running through marathon play sessions. And in a solar garden light with a proper charge controller, the 2800mAh capacity stores enough energy during the day to illuminate pathways from dusk till well past midnight, outperforming the small 1500mAh cells commonly found in these fixtures.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eBuilt to Last, Designed to Protect\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eInside the robust nickel-plated steel can, advanced NMC chemistry maintains a flat 3.7V discharge curve. Your lights stay bright, your motors keep torque, and your toys don’t suddenly slow down. 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\u003erestricts current during a short circuit or overload, while a precision\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003esafety vent\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ereleases pressure under extreme thermal stress. With over 500 full charge cycles and an exceptionally low self-discharge rate, this battery can sit in a drawer for months and still wake up with most of its capacity intact. It’s a sustainable, cost-effective replacement for disposable alkaline batteries, capable of preventing hundreds of single-use cells from reaching landfills.\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=\"\"\u003eSubstantial 2800mAh (10.4Wh) Capacity\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003e40% more energy than a standard 2000mAh cell. Provides approximately 3 hours of flashlight high-mode runtime, 8-10 hours of headlamp reading light, or extended RC car bashing without frequent swaps.\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 Architecture\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eShorter physical length (65.0mm flat top, 66.5mm button top) fits devices that reject protected cells. Lower overall internal resistance means more efficient power delivery and less heat build-up.\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 for Total Compatibility\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 tight battery tubes and spot-welded DIY packs. Simply select the version your device manual specifies.\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 3.7V NMC Chemistry\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eMaintains a consistent voltage plateau from 4.2V down to 2.5V. Regulated electronics — flashlights, fans, RC receivers — enjoy unwavering performance until the cell is nearly empty.\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 (≤65mΩ)\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eVoltage sag is barely perceptible under typical 1–3A loads, and remains well-controlled even at the maximum 5A continuous discharge. Your devices extract every usable mAh.\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; Minimal 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 the recommended 3.6–3.7V, ready for emergencies or seasonal 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=\"\"\u003eIntegrated Passive Safety\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA resettable PTC thermistor and a resealable pressure vent offer first-line defense against overcurrent and extreme internal pressure. The steel can resists corrosion, leaks, and accidental drops.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEnvironmentally Responsible\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eOne 2800mAh 18650 replaces hundreds of disposable alkaline batteries over its life. Zero memory effect allows partial top-ups without capacity loss.\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\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2800mAh (10.4Wh)\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 in devices with built-in low-voltage protection)\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=\"\"\u003e1.4A (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. 1.8C) — designed for medium-drain, long-runtime use\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≤65mΩ (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)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 47g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWeight (Flat Top)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 46g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCycle Life\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≥500 cycles (≥70% initial capacity under standard conditions)\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 for 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=\"\"\u003eFlashlights \u0026amp; EDC Torches\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eDrop this 2800mAh cell into any enthusiast flashlight (ZebraLight, Emisar, Wurkkos, Convoy, etc.) that accepts unprotected 18650s and features low-voltage protection. On a 300-lumen medium mode, you’ll get around 3 hours of stable light. The flat top fits ultra-tight battery tubes, while the button top ensures positive contact in spring-loaded hosts. Perfect for night walks, security patrols, and emergency kits.\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 Use\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eTrail runners, campers, and mechanics will appreciate the extra runtime. At a comfortable 100-lumen setting, expect over 8 hours of hands-free illumination. The cell’s moderate weight keeps the headlamp balanced and comfortable 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=\"\"\u003eRC Cars \u0026amp; Hobby Vehicles\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eStandard 1\/10 and 1\/16 scale RC cars often run on 18650-based packs or direct-cell trays. With a 5A continuous discharge, this battery powers brushed motors and budget brushless setups reliably. The 2800mAh capacity provides noticeably longer runtimes than the 2000mAh cells often supplied, meaning more track time between charges.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMotorized Toys \u0026amp; Models\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eAction figures, robot kits, and educational STEM toys that accept 18650 cells benefit from the extended playtime. Children can enjoy a full afternoon of fun without swapping batteries. The button top is typically required for toy battery holders with simple spring contacts.\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 \u0026amp; Motion-Activated Garden Lights\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eMany outdoor garden lights use removable 18650 cells. This 2800mAh version stores more energy during daylight hours, ensuring pathways and flowerbeds stay illuminated well into the night. It’s an ideal upgrade for lights that originally shipped with 1500–2000mAh batteries, provided the device has its own charge controller with 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=\"\"\u003eDIY Battery Packs \u0026amp; Hobby Electronics\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eThe flat top variant is designed for spot welding into custom 2S or 3S packs for Bluetooth speakers, portable monitors, drone ground stations, or IoT projects. Unprotected architecture gives you total freedom over your battery management system, and the consistent capacity makes cell balancing straightforward.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEmergency Backup \u0026amp; Power Banks\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eStore a few charged cells in a waterproof container for power outages, camping trips, or natural disasters. Their low self-discharge means they’ll still be ready to power a flashlight, radio, or USB charger months later.\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: How much better is 2800mAh compared to 2000mAh?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: It’s a 40% capacity increase. In practical terms, if your flashlight lasts 2 hours on a 2000mAh cell, this one will give you nearly 3 hours. For RC cars, that could mean an extra 10–15 minutes of runtime. It’s a meaningful step up without the premium price of 3000mAh+ cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ2: Why is this battery unprotected?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Removing the protection PCB makes the cell shorter and lowers internal resistance. This is essential for many enthusiast flashlights and RC car battery trays that cannot physically fit a longer protected cell. It does mean you must only use it in a device that has its own low-voltage cutoff (most modern LED lights and hobby electronics do) and always charge it with a reliable Li-ion charger that stops at 4.2V.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: Should I buy Button Top or Flat Top?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Check your device. If the positive contact has a spring and a plastic ring that would block a flat top, choose\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 extremely tight or the contacts are flat metal pads, choose\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. For building welded packs, flat top is mandatory.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: Can I use this battery in a doorbell that originally used a 2000mAh cell?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes, but it’s overkill. Doorbells sip microamps in standby and even a 2000mAh battery can last over a year. A 2800mAh will work and last even longer, as long as the doorbell has low-voltage protection. However, the true value of this cell is in actively power-hungry devices like flashlights, RC cars, and toys.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: What’s the maximum current I can safely draw?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: 5A continuous. This is more than enough for any single-cell LED flashlight (even on turbo), most RC car brushed motors, and small fans. Do not use it in high-drain power tools, or custom RC setups that pull 10A+ — for those, choose a high-rate IMR or INR battery.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ6: How long does it take to charge?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: At the recommended 1.4A, a full charge from empty takes around 2.5 hours. A 1A charger will take roughly 3.5 hours. Always use a charger specifically designed for 3.7V Li-ion cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ7: How should I store this unprotected cell?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Keep it in a plastic battery case away from coins, keys, or other metal objects. For storage longer than a month, bring the voltage to approximately 3.6–3.7V (about 50% charge). Check the voltage every 3 months and recharge if it drops below 3.0V. Never store a completely empty cell.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ8: Is this battery safe to take on an airplane?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. At 10.4Wh, it is well under the 100Wh IATA limit for carry-on baggage. Insulate the terminals with tape or a cap, and always carry it in your hand luggage.\u003c\/span\u003e\u003c\/p\u003e","brand":"DELIPOW","offers":[{"title":"Button Top","offer_id":51454079992054,"sku":"5550DLP13","price":2.48,"currency_code":"USD","in_stock":true},{"title":"Flat Top","offer_id":51454080024822,"sku":"5550DLP14","price":2.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/2800mAh-18650-battery-RC-car-application-main_2688833f-b4d5-4a4b-af1e-203671ee39c3.webp?v=1786964483","url":"https:\/\/oneandes.com\/products\/3-7-volt-18650-rechargeable-batteries-lithium-battery-2800mah-for-flashlights-headlamps-doorbells-rc-carsoutdoor-garden-lights","provider":"OneAndes","version":"1.0","type":"link"}