{"product_id":"26700-lifepo4-3-2v-4000mah-3c-battery-2pack","title":"26700 LiFePO4 Battery 3.2V 4000mAh 3C - Flat Top \/ Button Top \/ Nickel Tabs (2-Pack) for Solar Lights \u0026 Energy Storage","description":"\u003ch2\u003e Important Notice: 3 Variant Size Differences\u003c\/h2\u003e\n\u003cp\u003eThis product is a \u003cstrong\u003e2-Pack\u003c\/strong\u003e of individual cells. Due to different top designs, the dimensions vary slightly. Please choose the right type based on your device's needs:\u003cbr\u003e\u003cstrong\u003e【Flat Top】\u003c\/strong\u003e: 26mm × 70mm (Standard flat top)\u003cbr\u003e\u003cstrong\u003e【Button Top】\u003c\/strong\u003e: 26mm × 72mm (With raised metal contact)\u003cbr\u003e\u003cstrong\u003e【With Nickel Tabs】\u003c\/strong\u003e: 26mm × 72mm (Pre-soldered tabs for easy connection\/spot welding)\u003cbr\u003e\u003cem\u003ePlease measure your battery compartment depth carefully before ordering to ensure compatibility.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eSafe, Long-Lasting, and Extreme Cold-Resistant\u003cbr\u003eThis 26700 LiFePO4 (Lithium Iron Phosphate) battery features a true 4000mAh capacity and a stable 3C (approx. 12A) discharge rate. Compared to traditional lithium-ion cells, it offers superior thermal stability with a secondary explosion-proof safety valve design, ensuring no leakage, no swelling, and absolute safety. Supporting over 2000 deep cycles and utilizing low self-discharge technology, it maintains excellent performance even in -20°C low-temperature environments. Ideal for solar street lights, outdoor energy storage, and security monitoring systems that require long-term stable power.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Safe Design:\u003c\/strong\u003e LiFePO4 chemistry combined with a fully inspected secondary explosion-proof safety valve. High temperature resistant, non-flammable, and leak-proof.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2000+ Ultra-Long Cycle Life:\u003c\/strong\u003e Economical and durable. Retains over 80% of its initial capacity after 2000 deep cycles, far outlasting standard NMC batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3C High Discharge Rate:\u003c\/strong\u003e Supports a max continuous discharge current of 12A (3C), meeting the high surge and steady power requirements of solar lights and monitoring devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Exceptional low-temperature discharge performance, operating stably in extreme environments from -20℃ to 60℃.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Self-Discharge:\u003c\/strong\u003e Engineered with low self-discharge technology, minimizing natural energy loss during long-term storage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDetailed Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Chemistry:\u003c\/strong\u003e LiFePO4 (Lithium Iron Phosphate)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Model:\u003c\/strong\u003e 26700\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e 3.2V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd-of-charge Voltage:\u003c\/strong\u003e 3.65V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Capacity:\u003c\/strong\u003e 4000mAh (12.8Wh)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge Rate:\u003c\/strong\u003e 3C (Max continuous discharge 12A)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Resistance:\u003c\/strong\u003e ≤16mΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCycle Life:\u003c\/strong\u003e ≥2000 cycles (capacity retention ≥80%)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 93g ± 2g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge Temperature:\u003c\/strong\u003e 0℃ ~ 50℃\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge Temperature:\u003c\/strong\u003e -20℃ ~ 60℃\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Flat Top 26×70mm \/ Button Top 26×72mm \/ Nickel Tabs 26×72mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e 2-Pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSolar street lights and garden light energy storage.\u003c\/li\u003e\n\u003cli\u003eSecurity surveillance systems and outdoor IoT sensors.\u003c\/li\u003e\n\u003cli\u003eOutdoor backup power and solar energy storage systems.\u003c\/li\u003e\n\u003cli\u003ePower tools and high-intensity emergency lighting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between Flat Top, Button Top, and Nickel Tabs? Which should I buy?\u003c\/strong\u003e\u003cbr\u003eA: \u003cstrong\u003eFlat Top\u003c\/strong\u003e is for devices with spring contacts. \u003cstrong\u003eButton Top\u003c\/strong\u003e features a raised positive terminal for devices that require pressure contact without springs. \u003cstrong\u003eWith Nickel Tabs\u003c\/strong\u003e comes pre-soldered with nickel sheets, making it convenient for spot welding or direct connection to wires. Please choose accordingly based on your project.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does 2-Pack mean I get 2 batteries?\u003c\/strong\u003e\u003cbr\u003eA: Yes, regardless of the variant chosen, you will receive 2 (two) individual batteries of the same specification.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use these to build a 12V battery pack?\u003c\/strong\u003e\u003cbr\u003eA: Yes, connecting 4 cells in series gives you a 12.8V pack. However, we strongly recommend using a specialized LiFePO4 BMS (Battery Management System) with a balancing function to ensure voltage consistency and safe operation.\u003c\/p\u003e","brand":"OneAndes","offers":[{"title":"Flat Top","offer_id":51472182804726,"sku":"OAS1234","price":17.58,"currency_code":"USD","in_stock":true},{"title":"Button Top","offer_id":51472182837494,"sku":"OAS1235","price":17.98,"currency_code":"USD","in_stock":true},{"title":"With Nickel Tabs","offer_id":51472182870262,"sku":"OAS1236","price":17.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/26700-lifepo4-4000mah-battery-main-2pack.webp?v=1786950687","url":"https:\/\/oneandes.com\/products\/26700-lifepo4-3-2v-4000mah-3c-battery-2pack","provider":"OneAndes","version":"1.0","type":"link"}