{"product_id":"vapcell-10370-140mah-3-2v-lifepo-e2-82-84-flat-top-ultra-safe-ifr-chemistry-for-micro-devices-4-pack","title":"4-Pack Vapcell 10370 140mAh 3.2V LiFePO₄ Flat Top Battery – Ultra-Safe IFR for Micro Medical, IoT \u0026 Sensors","description":"\u003ch4\u003e\u003cspan class=\"\"\u003eDescription\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003ePower your most critical micro devices with the ultimate in safety and longevity—the Vapcell 10370 140mAh LiFePO₄ battery. This 4-pack delivers a stable 3.2V nominal voltage and exceptional thermal stability, making it the definitive choice for micro medical instruments, IoT sensor nodes, miniature robotics, hearing aid accessories, and other space-constrained applications where safety can never be compromised. The LiFePO₄ (IFR) chemistry provides over 2000 charge\/discharge cycles and virtually eliminates the risk of fire or thermal runaway. At only 37mm long, it fits devices specifically designed for the rare 10370 form factor. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCritical:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e This is a 3.2V LiFePO₄ cell. It requires a dedicated LiFePO₄-compatible charger and is not compatible with standard 3.7V lithium-ion devices or 1.5V alkaline equipment. Always verify your device's exact battery dimensions and voltage requirements before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLiFePO₄ (Lithium Iron Phosphate) Chemistry\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – The safest lithium chemistry available. Exceptional thermal stability virtually eliminates fire or explosion risk. Ideal for medical devices worn close to the body, unattended sensors, and applications where safety is paramount.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2000+ Cycle Lifespan\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Provides over 2000 charge\/discharge cycles while retaining 80% capacity—approximately 4–5 times the lifespan of standard NMC lithium-ion cells. Dramatically reduces long-term replacement costs and maintenance frequency.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e140mAh \/ 3.2V Nominal\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Optimized for ultra-compact, low-power devices. Please note the 3.2V nominal voltage is unique to LiFePO₄ and not compatible with standard 3.7V or 1.5V systems. Total energy approximately 0.45Wh per cell.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRare 10370 Form Factor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Diameter of 10mm (same as AAA\/10440) but only \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e37mm long\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e—approximately 7mm shorter than a standard 10440 or AAA cell. Designed exclusively for micro devices with this specific short battery compartment. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAlways measure your device before ordering.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Compatible with devices featuring spring-loaded contacts. The flat positive terminal ensures reliable electrical connection in tight spaces.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eUltra-Low Self-Discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – LiFePO₄ cells retain their charge exceptionally well during storage, making them perfect for emergency backup power and intermittently used devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e4-Pack Convenience\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Perfect for powering multiple IoT sensor nodes, keeping spares for critical medical devices, or equipping a fleet of micro 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=\"\"\u003eCritical Charger Requirement\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMust use a charger with dedicated LiFePO₄ (3.2V) mode.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Standard 3.7V lithium-ion chargers will dangerously overcharge this cell and cause permanent damage.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eParameters\u003c\/span\u003e\u003c\/h4\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\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e\n\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\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eVapcell 10370 140mAh\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eForm Factor\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e10370 (rare size: 10mm diameter × 37mm length)\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\u003cstrong\u003e\u003cspan class=\"\"\u003eLiFePO₄ (Lithium Iron Phosphate \/ IFR)\u003c\/span\u003e\u003c\/strong\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\u003cstrong\u003e\u003cspan class=\"\"\u003e3.2 V\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCharge Voltage (Max)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e3.65 V ± 0.05 V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTypical Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e140 mAh (0.2C discharge to 2.0V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMinimum Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e~130 mAh\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge (CDR)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e~0.5–1 A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (estimated; designed for low-power micro devices)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Pulse Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eUp to 1.5 A (short burst, monitor temperature)\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=\"\"\u003e2.0 V (do not over-discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eStandard Charge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCC-CV, 0.5C (70 mA) to 3.65 V, cut-off 10 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Charge Current\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e1C (140 mA); 0.5C recommended for best longevity\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≤ 200 mΩ (AC 1 kHz)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCycle Life\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e≥ 2000 cycles\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (to 80% capacity)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eSelf-Discharge Rate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eExtremely low; retains ~80% charge after 1 year of storage\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eOperating Temperature (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=\"\"\u003eCharging Temperature\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=\"\"\u003eTop Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 10.0 mm diameter × 37.0 mm length (7mm shorter than 10440\/AAA)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (single cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 8 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003ePackage Includes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e4 × Vapcell 10370 140mAh LiFePO₄ flat top cells in protective packaging\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRecommended For\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=\"\"\u003eMicro Medical Instruments\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Portable diagnostic tools, miniature infusion pumps, and wearable health monitors where safety and reliability are non-negotiable. LiFePO₄'s thermal stability is critical for body-worn devices.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eIoT Sensor Nodes \u0026amp; Environmental Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Long-term unattended deployment in remote locations. The 2000+ cycle life and ultra-low self-discharge minimize maintenance visits.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHearing Aid Accessories \u0026amp; Assistive Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Certain specialized hearing aid components and personal sound amplifiers use 10370 cells. The safe chemistry is ideal for devices used close to the body daily.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMiniature Robotics \u0026amp; Micro Models\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Tiny servo-driven robots and scale models that require a compact, lightweight power source with safe chemistry.\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 for RTC \u0026amp; Memory\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Small-scale real-time clock (RTC) and SRAM backup in embedded systems where reliability over years is critical.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMicro LED Indicators \u0026amp; Emergency Beacons\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Long-lasting, stable power for small safety lights and signal beacons.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNot Recommended For\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=\"\"\u003e10440 or AAA Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 10370 is only 37mm long—approximately 7mm shorter than a standard 10440 or AAA cell. It will not make proper contact in devices designed for longer cells. Always verify your device's battery compartment length.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard 3.7V Lithium-Ion Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 3.2V nominal voltage is significantly lower than 3.7V. Many devices designed for 3.7V will show low battery warnings or fail to operate correctly.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard 1.5V Alkaline\/NiMH Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The 3.2V voltage is more than double that of a 1.5V cell. Using this battery in a 1.5V device will permanently damage the electronics.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard 3.7V Lithium-Ion Chargers\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eYou must use a charger with dedicated LiFePO₄ (3.2V) mode.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e A standard 4.2V charger will overcharge this cell to dangerous levels.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHigh-Drain Applications (\u0026gt;1A)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: This cell is designed for low-power micro devices. For applications requiring higher currents, use a larger form factor cell.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eFAQ\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: What is LiFePO₄ and why is it safer than regular lithium-ion?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: LiFePO₄ (Lithium Iron Phosphate, also called IFR) is a lithium chemistry with an inherently stable crystal structure that resists thermal runaway. Unlike standard NMC or LCO lithium-ion cells, LiFePO₄ cells will not catch fire or explode even if punctured, short-circuited, or exposed to extreme temperatures. This makes them the preferred choice for medical devices, unattended sensors, and any application where safety cannot be compromised. The trade-off is lower voltage (3.2V vs. 3.7V) and lower energy density.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Will this battery fit my 10440 or AAA device?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNo.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e The 10370 is only \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e37mm long\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e, while a standard 10440 or AAA cell is approximately 44mm. The 7mm difference means it will either not make contact at all or will be too short for the battery compartment to close properly. This cell is designed exclusively for devices that specifically require the 10370 form factor. Always measure your device's battery compartment or check the manufacturer's specifications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Can I charge this with my existing lithium-ion charger?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eOnly if your charger has a dedicated LiFePO₄ (3.2V) mode.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Standard lithium-ion chargers charge to 4.2V, which will dangerously overcharge a LiFePO₄ cell (maximum safe voltage is only 3.65V). Using the wrong charger will permanently damage the battery and could create a fire hazard. Always verify your charger explicitly supports LiFePO₄ before use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Why is the capacity only 140mAh? That seems very small.\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: The 10370 form factor is extremely compact—only 10mm in diameter and 37mm in length, with a total volume of less than 3 cubic centimeters. Additionally, LiFePO₄ chemistry inherently has lower energy density than NMC lithium-ion cells. The 140mAh capacity is appropriate for this size and chemistry. These cells are designed for low-power micro devices that prioritize safety and cycle life over raw capacity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: How long will this battery last in my IoT sensor?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Runtime depends entirely on your device's power consumption. For a typical IoT sensor drawing 50µA in sleep mode and 20mA during brief transmission bursts, a single 140mAh cell could potentially last several months between charges. For continuous low-current applications (e.g., 1mA draw), expect approximately 120–140 hours of operation. The 2000+ cycle life means the cell can be recharged daily for over 5 years.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: How should I store these cells when not in use?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Store at approximately 3.2–3.3V (50–70% charge for LiFePO₄) in a cool, dry place. Use non-conductive battery cases to prevent accidental short circuits. LiFePO₄ cells have an exceptionally low self-discharge rate, retaining approximately 80% of their charge after a full year of storage, making them ideal for emergency backup applications.\u003c\/span\u003e\u003c\/p\u003e","brand":"Vapcell","offers":[{"title":"Default Title","offer_id":51454203035894,"sku":"OAS997","price":14.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/vapcell-10370-4pack_d2cd44d6-3021-419a-a742-cea34f2e9349.webp?v=1786967704","url":"https:\/\/oneandes.com\/products\/vapcell-10370-140mah-3-2v-lifepo-e2-82-84-flat-top-ultra-safe-ifr-chemistry-for-micro-devices-4-pack","provider":"OneAndes","version":"1.0","type":"link"}