Important Notice: 3 Variant Size Differences
This product is a 2-Pack of individual cells. Due to different top designs, the dimensions vary slightly. Please choose the right type based on your device's needs:
【Flat Top】: 26mm × 70mm (Standard flat top)
【Button Top】: 26mm × 72mm (With raised metal contact)
【With Nickel Tabs】: 26mm × 72mm (Pre-soldered tabs for easy connection/spot welding)
Please measure your battery compartment depth carefully before ordering to ensure compatibility.
Product Description
Safe, Long-Lasting, and Extreme Cold-Resistant
This 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.
Key Features
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Ultra-Safe Design: LiFePO4 chemistry combined with a fully inspected secondary explosion-proof safety valve. High temperature resistant, non-flammable, and leak-proof.
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2000+ Ultra-Long Cycle Life: Economical and durable. Retains over 80% of its initial capacity after 2000 deep cycles, far outlasting standard NMC batteries.
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3C High Discharge Rate: Supports a max continuous discharge current of 12A (3C), meeting the high surge and steady power requirements of solar lights and monitoring devices.
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Wide Operating Temperature: Exceptional low-temperature discharge performance, operating stably in extreme environments from -20℃ to 60℃.
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Low Self-Discharge: Engineered with low self-discharge technology, minimizing natural energy loss during long-term storage.
Detailed Specifications
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Battery Chemistry: LiFePO4 (Lithium Iron Phosphate)
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Battery Model: 26700
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Nominal Voltage: 3.2V
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End-of-charge Voltage: 3.65V
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Nominal Capacity: 4000mAh (12.8Wh)
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Discharge Rate: 3C (Max continuous discharge 12A)
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Internal Resistance: ≤16mΩ
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Cycle Life: ≥2000 cycles (capacity retention ≥80%)
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Weight: Approx. 93g ± 2g
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Charge Temperature: 0℃ ~ 50℃
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Discharge Temperature: -20℃ ~ 60℃
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Dimensions: Flat Top 26×70mm / Button Top 26×72mm / Nickel Tabs 26×72mm
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Packaging: 2-Pack
Applications
- Solar street lights and garden light energy storage.
- Security surveillance systems and outdoor IoT sensors.
- Outdoor backup power and solar energy storage systems.
- Power tools and high-intensity emergency lighting.
FAQ
Q: What is the difference between Flat Top, Button Top, and Nickel Tabs? Which should I buy?
A: Flat Top is for devices with spring contacts. Button Top features a raised positive terminal for devices that require pressure contact without springs. With Nickel Tabs comes pre-soldered with nickel sheets, making it convenient for spot welding or direct connection to wires. Please choose accordingly based on your project.
Q: Does 2-Pack mean I get 2 batteries?
A: Yes, regardless of the variant chosen, you will receive 2 (two) individual batteries of the same specification.
Q: Can I use these to build a 12V battery pack?
A: 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.
