{"product_id":"2pack-3-7v-1500mah-icr-5-55wh-lithium-li-ion-rechargeable-battery-for-led-flashlight-headlamps-doorbells-rc-cars","title":"1500mAh (5.55Wh) 3.7V 18650 Li-ion Rechargeable Battery (2-Pack) – for Mini Flashlights, Headlamps, Doorbells \u0026 Solar Lights","description":"\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSmall Capacity, Smart Choice\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eNot every device needs a 3500mAh marathon cell. For many everyday gadgets, a lighter, more affordable 1500mAh battery is the perfect fit — and this 2‑pack delivers exactly that. Each cell stores 5.55 watt‑hours of genuine energy, purpose‑built for low‑drain applications where a giant battery would add unnecessary cost and weight. Slide one into a mini flashlight for occasional pocket use, a lightweight headlamp for quick tasks, a wireless doorbell that sips power for months, or a solar garden light that needs just enough energy to glow from dusk till late evening. The second cell stays charged and ready, so you’re never left in the dark.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUnprotected Design: Shorter, Lighter, More Efficient\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eWe intentionally leave off the external protection PCB to make these cells as compact and electrically pure as possible. At only 65.0mm (flat top) or 66.5mm (button top), they slip effortlessly into tight battery compartments that refuse to accept longer protected cells — think slim headlamps, compact solar lights, and tiny LED torches. Removing the PCB also eliminates an extra layer of resistance, so more of the battery’s energy reaches your device and less is wasted as heat. The trade‑off is simple: you must use a quality charger that stops precisely at 4.2V, and only insert the cell into devices that have their own built‑in low‑voltage cutoff. Nearly all modern mini flashlights, headlamps, doorbells, and solar charge controllers already incorporate this, making them ideal partners.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eChoose Your Terminal: Button Top or Flat Top\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eWe offer both terminal styles so you never have to compromise. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e version has a raised positive nipple (~1.5mm) that locks securely into spring‑loaded compartments and easily clears mechanical reverse‑polarity rings — common in many consumer flashlights and headlamps. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e version has a completely flush positive end, which is essential for devices with ultra‑tight battery tubes, for building spot‑welded DIY battery packs, and for gadgets that use pogo‑pin or flat PCB contacts. Simply pick the variant that matches your device’s manual, and enjoy a rattle‑free connection every time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWhere 1500mAh Is Exactly Right\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eRated for a continuous discharge of up to 3A (2C), these cells are tailor‑made for low to moderate power draws. In a mini pocket flashlight, the 1500mAh capacity provides around an hour of bright 150‑lumen light, or several hours on a low mode — perfect for finding a keyhole, walking the dog, or navigating a dark hallway. In a lightweight headlamp used for reading or close‑up work, it delivers hours of comfortable illumination without weighing down your forehead. In a wireless doorbell, the ultra‑low standby current means a single charge can last well over a year. And in a solar‑powered garden light, the 5.55Wh energy buffer stores a full day’s sun and releases it as gentle nighttime glow, far outlasting the smaller 800–1200mAh cells often bundled with these fixtures. With two cells in the pack, you can keep one in use and one on standby — zero downtime.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSafety and Longevity\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eEach cell includes a built‑in \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePTC thermistor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e that suppresses dangerous over‑current spikes, and a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eresealable pressure vent\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e that activates if internal pressure ever reaches a critical level. The nickel‑plated steel can withstands drops, corrosion, and daily knocks. With a cycle life of over 500 full charges and very low self‑discharge, these batteries can sit in a drawer for months and still wake up with most of their capacity intact. This 2‑pack replaces dozens of disposable alkaline batteries over its lifetime, saving you money and reducing waste — a smart choice for your low‑drain devices and the planet.\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=\"\"\u003e2‑Pack Value Set\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eTwo identical 1500mAh cells. Keep one in your device, one fully charged in reserve — ideal for intermittent, low‑drain gadgets.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGenuine 1500mAh Capacity (5.55Wh per cell)\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eHonest energy for power‑sipping electronics. Great for mini flashlights, headlamps, doorbells, and solar lights that don’t require extended runtime.\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 Design for Compactness \u0026amp; Efficiency\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eShorter overall length fits tight battery compartments. Lower internal resistance ensures efficient power delivery with minimal heat. Requires a 4.2V Li‑ion charger and a 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=\"\"\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 clicks securely into spring‑contact devices. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e is mandatory for recessed contacts, welded packs, and ultra‑compact gadgets. Full compatibility, no adapters.\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 ICR\/NMC Chemistry\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eHolds a steady 3.7V nominal voltage from 4.2V down to 2.5V. Your light stays consistent, your doorbell remains reliable, and your solar light shines evenly night after night.\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 each cell over 500 times with minimal capacity fade. Store the spare for months at 3.6–3.7V; it will still be ready when 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=\"\"\u003eBuilt‑In Passive Safety\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eIntegrated PTC thermistor and resealable vent provide foundational protection against over‑current and internal pressure. Rugged steel can resists impact 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=\"\"\u003eEconomical \u0026amp; Eco‑Friendly\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eAffordable power for low‑drain devices. Replaces dozens of disposable alkaline batteries, cutting waste and long‑term costs.\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\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\u003c\/div\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 Type\u003c\/span\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\u003cspan class=\"\"\u003eNominal Capacity per Cell\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e1500mAh (5.55Wh)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003ePack Count\u003c\/span\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\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=\"\"\u003e750mA (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\u003cspan class=\"\"\u003e3A (2C) — suited for low to medium drain\u003c\/span\u003e\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=\"\"\u003e5A (\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≤80mΩ (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) or \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (flush)\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. 18.3mm dia. × 66.5mm 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. 18.3mm dia. × 65.0mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (Button Top) per cell\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 43g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (Flat Top) per cell\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 42g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCycle Life per cell\u003c\/span\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\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)\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=\"\"\u003eICR \/ NMC (Lithium Cobalt Oxide \/ Nickel Manganese Cobalt)\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. Mini Flashlights \u0026amp; Pocket Torches\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eTiny EDC lights and keychain torches often need just a small 18650. The 1500mAh cell provides about an hour of useful light on a medium mode, or multiple evenings of occasional pocket use. Flat top fits ultra‑tight tubes; button top secures firmly in spring‑contact hosts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2. Lightweight Headlamps for Short Tasks\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eReading in bed, fixing a leak under the sink, or an evening jog doesn’t demand a heavy, high‑capacity battery. The 1500mAh cell keeps the headlamp light and balanced, while still delivering several hours of low‑to‑medium brightness. Button top is usually preferred for spring‑loaded headlamp compartments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3. Wireless Doorbells \u0026amp; Smart Sensors\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eThese devices consume microscopic standby current and only pulse during a ring event. A single 1500mAh cell can power a doorbell for 6–12 months easily. The unprotected flat top fits the original battery cradle in many smart doorbell models that already manage their own low‑voltage protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e4. Solar‑Powered Garden \u0026amp; Path Lights\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eMany outdoor solar lights come with 18650 batteries in the 1200–1500mAh range. This 2‑pack is the perfect direct replacement. Swap in a fresh cell, and your lights will store daytime energy and illuminate your garden or pathway throughout the night. Ensure the solar light’s charge controller includes over‑discharge protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5. DIY Electronics \u0026amp; STEM Kits\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eArduino projects, small IoT sensors, and LED displays that draw well under 1A run happily on these 1500mAh cells. The flat top is ready for spot welding into 2S or 3S packs. The affordable price makes them a favorite for educational and hobbyist builds.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e6. Emergency Backup Lighting\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eKeep a couple of charged cells in a waterproof case. When a power outage hits or you need a spare for a small lantern, these lightweight batteries are easy to store and quick to deploy.\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 1500mAh enough capacity? It sounds low.\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: It’s intentionally compact. For low‑drain devices like doorbells, solar lights, and mini flashlights used occasionally, 1500mAh is more than adequate — providing months of standby or hours of useful light. If you need marathon runtime for a high‑power flashlight or fan, consider our 2500mAh or 3500mAh models. Choose the capacity that matches your device’s actual need.\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: We omit the protection PCB to keep the cell as short as possible (fits more devices) and to reduce internal resistance. It’s completely safe when used in a device that has its own low‑voltage cutoff (most modern mini flashlights, headlamps, doorbells, and solar controllers do) and charged with a proper 4.2V Li‑ion charger. The built‑in PTC and vent add an extra layer of passive protection.\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: Check your device’s battery compartment. If the positive contact has a spring and a physical ring around it, a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e is usually needed to make firm contact. If the tube is extremely tight or the contact is a flat metal pad\/PCB trace, you need a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e. For building welded battery packs, always choose flat top.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ4: Can I use these batteries in a high‑drain RC car or power tool?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: No. These cells are rated for a maximum continuous discharge of 3A. RC cars and power tools typically demand 5–20A or more, which would cause the battery to overheat, sag severely, and possibly vent. For high‑drain applications, please select our high‑rate 10C cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: How long will a 1500mAh battery last in a mini fan?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: A very small USB fan drawing 0.5A on low speed might run for roughly 3 hours. A more powerful fan drawing 1A would last about 1.5 hours. The 2‑pack lets you swap and keep the breeze going.\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: Keep it in a plastic battery case, away from metal objects and moisture. For storage longer than a month, adjust the voltage to about 3.6–3.7V (roughly 50% charge). Check it every 3 months and recharge if the voltage 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=\"\"\u003eQ7: How many recharge cycles can I expect?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Over 500 full charge\/discharge cycles while still retaining at least 70% of the original capacity. For low‑drain devices that are charged infrequently, this can easily translate to many years of reliable service.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ8: Can I take these batteries on an airplane?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. At 5.55Wh per cell, they are well under the 100Wh IATA limit. Always carry lithium batteries in your hand luggage, and insulate the terminals with tape or a plastic case.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ9: What charger should I use?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: You must use a charger specifically designed for 3.7V Li‑ion cells that terminates at exactly 4.2V. A basic single‑bay smart charger is perfect. Never use a charger intended for NiMH or alkaline batteries.\u003c\/span\u003e\u003c\/p\u003e","brand":"DOUBLEPOW","offers":[{"title":"Button Top","offer_id":51454082253046,"sku":"5550DLP49","price":5.08,"currency_code":"USD","in_stock":true},{"title":"Flat Top","offer_id":51454082285814,"sku":"5550DLP50","price":4.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/2pack-1500mAh-icr-lithium-battery-main-1_a26c7d11-484a-45b5-8bdd-0296fc074c6a.webp?v=1786964684","url":"https:\/\/oneandes.com\/products\/2pack-3-7v-1500mah-icr-5-55wh-lithium-li-ion-rechargeable-battery-for-led-flashlight-headlamps-doorbells-rc-cars","provider":"OneAndes","version":"1.0","type":"link"}