{"product_id":"2-pack-18650-batteries-3-7v-1200mah-li-ion-rechargeable-li-ion-icr-18650-1200mah-3-7v-4-44wh-rechargeable-batteries-for-led-headlamps-doorbells-rc-cars","title":"1200mAh (4.44Wh) 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=\"\"\u003eThe Smart, Lightweight Power Duo\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eNot every device needs a marathon‑runner battery. Sometimes, a lighter, more affordable cell is the perfect match — and this 2‑pack of 1200mAh 18650 batteries delivers exactly that. Each cell stores 4.44 watt‑hours of genuine energy, making it an ideal choice for low‑drain electronics where a larger 3000mAh battery would simply be overkill. Pop one into a mini flashlight for occasional pocket use, a wireless doorbell that sips power, or a solar garden light that charges by day and glows at night. The second cell stays charged and ready, so you always have a spare when you need it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUnprotected, Uncluttered, Uncompromising\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eWe deliberately keep the external protection PCB off these batteries. Why? Two reasons: shorter length and lower internal resistance. At only 65.0mm (flat top) or 66.5mm (button top), they slide effortlessly into devices with tight battery compartments — think slim headlamps, compact solar lights, and mini LED torches that can’t fit longer protected cells. Removing the PCB also eliminates an extra layer of electrical resistance, meaning more of the battery’s energy reaches your gadget and less is wasted as heat. Naturally, this design expects you to use a quality charger that stops precisely at 4.2V and to only insert the cell into devices that have their own low‑voltage cutoff. Nearly all modern mini flashlights, headlamps, doorbells, and solar charge controllers already feature this protection, 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=\"\"\u003eBecause no single shape works for every device, we offer both variants. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e has a raised positive nipple (~1.5mm) that locks securely into spring‑loaded compartments and easily passes mechanical reverse‑polarity guards — 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 features a completely flush positive end, which is mandatory for devices with ultra‑tight battery tubes, for building spot‑welded DIY battery packs, and for gadgets that rely on pogo‑pin or flat PCB contacts. Simply check your device manual, select the correct version, and enjoy a wiggle‑free connection every time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWhere 1200mAh Makes Perfect Sense\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eRated for a continuous discharge of up to 2.4A (2C), these cells are purpose‑built for low to moderate power draws. In a mini pocket flashlight or keychain light, the 1200mAh capacity delivers roughly an hour of bright 100–200 lumen output, or several hours of gentle low‑mode illumination — plenty for occasional tasks like finding a keyhole or walking to the car. In a wireless doorbell, the ultra‑low standby current means a single charge can last well over a year. In solar‑powered garden lights, the 4.44Wh energy store charges fully during daylight and keeps pathways and flowerbeds softly lit until late evening. For headlamps used for short tasks — think reading in bed, repairing a sink, or a quick evening jog — this battery provides a lightweight, budget‑friendly solution. And because you get two cells in the pack, you can keep one in use and one on standby, reducing downtime to zero.\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=\"\"\u003eDespite the absence of a protection IC, each 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 under extreme internal pressure. The nickel‑plated steel can resists corrosion, drops, and daily wear. With a cycle life of over 500 full charges and 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 lifespan, making it a wallet‑friendly and eco‑conscious choice for your everyday low‑drain devices.\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 1200mAh cells. Always keep a spare fully charged — ideal for devices that see intermittent, low‑drain 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=\"\"\u003eGenuine 1200mAh Capacity (4.44Wh per cell)\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eHonest, usable energy for low‑power electronics. Great for mini flashlights, doorbells, solar lights, and headlamps that don’t require marathon 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 form factor fits tight battery compartments. Lower internal resistance ensures efficient energy transfer 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=\"\"\u003eChoose Button Top or 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 for secure spring‑contact connection; \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for recessed contacts, welded packs, and ultra‑compact devices. True compatibility without compromise.\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\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 doesn’t flicker, your doorbell stays reliable, and your solar light shines consistently.\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=\"\"\u003ePTC thermistor and resealable vent provide foundational protection against over‑current and internal pressure. 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=\"\"\u003eA cost‑effective solution for low‑drain devices. Replaces dozens of disposable alkaline batteries, reducing waste and saving money.\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 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=\"\"\u003e1200mAh (4.44Wh)\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=\"\"\u003e600mA (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=\"\"\u003e2.4A (2C) — optimized 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=\"\"\u003e4A (\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. 42g\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. 41g\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=\"\"\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\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; Keychain Lights\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eTiny pocket torches and keychain LED lights often run on a single 18650 but don’t need huge capacity. The 1200mAh cell provides enough energy for an hour of bright light or several hours of low‑mode glow — perfect for short, occasional tasks. Flat top fits ultra‑tight tubes; button top works in spring‑loaded hosts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2. Headlamps for Light‑Duty Use\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eReading in bed, working under a sink, or a quick evening jog doesn’t require a 3500mAh cell. The lightweight 1200mAh battery keeps the headlamp balanced and delivers plenty of runtime for short, focused tasks. Button top is usually required for spring‑contact headlamp compartments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e3. Wireless Doorbells \u0026amp; Sensors\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eThese devices sip microamps in standby and only pulse during a ring event. A single 1200mAh cell can easily power a doorbell for 6–12 months. The unprotected flat top fits the original battery cradle in many smart doorbell models.\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 a removable 18650 of 1200–1500mAh. This 2‑pack is the perfect direct replacement. Pop in a fresh cell, and your lights will continue to charge by day and glow by night. Always ensure the solar light’s controller has 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 Projects\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eArduino sensors, small robots, and LED display projects that draw less than 1A run happily on these 1200mAh cells. The flat top is ready for spot welding into 2S or 3S packs. The affordable price makes it a favorite for educational kits.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e6. Backup Emergency Lighting\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eKeep a couple of charged cells in a waterproof case. When the power fails or you need a spare for a mini 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 1200mAh enough capacity? Why not choose a larger battery?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: It depends on your device. For low‑drain gadgets like doorbells, solar lights, and mini flashlights used occasionally, 1200mAh is more than enough. A larger 3000mAh battery would be physically identical but cost more without any real benefit in these applications. If you need extended runtime for a high‑power flashlight or fan, consider our 2500mAh or 3500mAh models.\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 reduce length and internal resistance. This ensures the cell fits in tight battery compartments and delivers power efficiently. It’s safe when used in devices with built‑in low‑voltage cutoff (most modern electronics have this) and charged with a proper 4.2V Li‑ion charger. The cell includes a PTC thermistor and a safety vent for passive protection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ3: Should I choose 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 physical ring around it, you likely need a \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eButton Top\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e for firm contact. If the battery 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 use flat top.\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 high‑drain RC car or power tool?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: No. This cell is rated for a maximum continuous discharge of 2.4A. RC cars and power tools typically draw 5–20A or more, which would cause the battery to overheat, sag severely, and possibly trigger its safety vent. For high‑drain applications, please choose our high‑rate 10C or 20A cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ5: How long will a 1200mAh battery run my mini fan?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: It depends on the fan. A tiny USB fan drawing 0.5A on low speed might run for about 2–2.5 hours. For a larger fan drawing 1A, expect roughly 1–1.2 hours. The 2‑pack lets you swap and continue using while the other charges.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ6: How do 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 keys, coins, and moisture. For storage longer than a month, charge or discharge to about 3.6–3.7V (roughly 50%). Check the voltage 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 these?\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, this can translate to many 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 on an airplane?\u003c\/span\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. At 4.44Wh 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).\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 designed for 3.7V Li‑ion cells that terminates at exactly 4.2V. A basic single‑bay smart charger is perfect. Never use a NiMH or alkaline charger.\u003c\/span\u003e\u003c\/p\u003e","brand":"DOUBLEPOW","offers":[{"title":"Button Top","offer_id":51454082056438,"sku":"5550DLP47","price":4.58,"currency_code":"USD","in_stock":true},{"title":"Flat Top","offer_id":51454082089206,"sku":"5550DLP48","price":4.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/2pack-1200mAh-li-ion-icr-18650-batteries-main_b87d96fb-8830-4ad0-9321-ad8f40a2d5b3.webp?v=1786964666","url":"https:\/\/oneandes.com\/products\/2-pack-18650-batteries-3-7v-1200mah-li-ion-rechargeable-li-ion-icr-18650-1200mah-3-7v-4-44wh-rechargeable-batteries-for-led-headlamps-doorbells-rc-cars","provider":"OneAndes","version":"1.0","type":"link"}