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Built with advanced LiFePO4 (Lithium Iron Phosphate) technology, this battery pack delivers exceptional reliability, long-lasting energy, and versatile compatibility, making it an ideal choice for both residential and commercial use. With a nominal capacity of 4000mAh (minimum 3900mAh) and a stable nominal voltage of 3.2V, it ensures consistent power output to keep your lighting systems running when grid power fails. Measuring 26.3±0.3mm in width and 71.0±0.5mm in height, the 26700 form factor offers easy replaceability, allowing you to swap old batteries without hassle. Whether for emergency exit signs, portable work lights, or outdoor camping lamps, this battery pack combines durability, efficiency, and safety to meet your critical power needs.
No. | Items | Specifications | Specifications | Specifications | Remark |
1 | Nominal Capacity | 4000mAh | 4000mAh | 4000mAh | 0.2C Standard discharge |
2 | Minimum Capacity | 3900mAh | 3900mAh | 3900mAh | |
3 | Nominal Voltage | 3.2V | 3.2V | 3.2V | Mean Operation Voltage |
4 | Delivery voltage | 3.20~3.3V | 3.20~3.3V | 3.20~3.3V | Within 10 days from Factory |
5 | Charge Voltage | 3.65V±0.03V | 3.65V±0.03V | 3.65V±0.03V | By standard charge method |
6 | Standard charging method | 0.2C constant current, 3.65V constant voltage charge to 3.65V, continue charging till current decline to ≤0.01C | 0.2C constant current, 3.65V constant voltage charge to 3.65V, continue charging till current decline to ≤0.01C | 0.2C constant current, 3.65V constant voltage charge to 3.65V, continue charging till current decline to ≤0.01C | 0.2C constant current, 3.65V constant voltage charge to 3.65V, continue charging till current decline to ≤0.01C, charging time about 6h (Ref) |
7 | Charge current | 0.2C | 0.2C | 800mA | Standard charge, charge time about 6h (Ref) |
1C | 1C | 4000mA | Rapid Charge, charge time about 1.5h (Ref) | ||
8 | Standard discharging method | 0.2C constant current discharge to 2.0V | 0.2C constant current discharge to 2.0V | 0.2C constant current discharge to 2.0V | 0.2C constant current discharge to 2.0V |
9 | Cell Internal Impedance | ≤25mΩ | ≤25mΩ | ≤25mΩ | Internal resistance measured at AC 1KHZ after 50% charge |
10 | Maximum charge current | 1C | 4000mA | 4000mA | For continuous charging mode |
11 | Maximum discharge current | 3C | 12A | 12A | For continuous discharge mode |
At the core of this battery pack is a 4000mAh high-capacity cell, tested under 0.2C standard discharge to deliver reliable power for extended periods. With a minimum capacity of 3900mAh, you can trust it to provide consistent energy output without sudden drops—perfect for lighting systems that require stable performance during emergencies. The 0.2C standard discharge method (constant current to 2.0V) ensures efficient energy utilization, maximizing runtime for your devices.
Designed to thrive in extreme environments, this battery pack features a wide temperature range that outperforms traditional batteries. It operates seamlessly in discharge temperatures from -20℃ to 60℃ and charging temperatures from 0℃ to 55℃ (60±25% R.H.), making it suitable for both cold outdoor settings and warm indoor spaces. Whether you’re using it in a freezing garage or a heated warehouse, the battery maintains its performance, eliminating concerns about temperature-related power loss.
LiFePO4 chemistry is renowned for its superior safety and stability, and this battery pack leverages that advantage to the fullest. With an internal resistance of ≤25mΩ (measured at AC 1KHZ in 50% charge state), it minimizes energy loss and heat generation during charging and discharging. The low internal resistance also ensures efficient power transfer, reducing wear on both the battery and your devices. Additionally, the battery adheres to strict safety standards, with no risk of overheating or leakage when used as directed.
Flexibility is key with this battery pack, which offers two convenient charging options. The standard charging mode (0.2C/800mA) takes approximately 6 hours to fully charge, ideal for overnight or planned charging. For quick top-ups, the fast charging mode (1C/4000mA) delivers a full charge in just 1.5 hours—perfect for emergency situations where time is critical. Both modes use a 3.65V±0.03V constant voltage charging method, ensuring safe and complete charging until the current drops to ≤0.01C.
The replaceable battery pack design eliminates the need to replace entire lighting systems when batteries degrade—simply swap out the old pack for a new one, saving time and money. When not in use, the battery can be stored for extended periods in temperatures ranging from -20℃ to 25℃ (60±25% R.H.). For optimal performance, store for no more than 6 months without charging; batteries with protection circuits require a charge every 3 months, ensuring they’re ready to use when you need them most.
With a maximum continuous discharge current of 3C/12A and a maximum continuous charging current of 1C/4000mA, this battery pack can handle high-power lighting devices with ease. Whether powering bright work lights or energy-intensive emergency lamps, it delivers the current needed to maintain optimal brightness without compromising performance. This makes it a reliable choice for industrial settings, construction sites, and outdoor activities where high-power lighting is essential.
This battery pack is engineered as a lighting back-up battery for emergency lighting systems, including exit signs, emergency ceiling lights, and corridor lamps. When grid power is interrupted, it kicks in instantly to provide consistent illumination, ensuring safe evacuation and visibility. Its wide temperature range and long runtime make it suitable for schools, hospitals, office buildings, and residential complexes.
For outdoor enthusiasts and professionals, this battery pack serves as a reliable power source for portable lighting. Use it to power camping lamps, hiking headlamps, or job-site work lights—even in cold temperatures as low as -20℃. The replaceable design means you can carry spare packs for extended trips, ensuring you never run out of light in remote locations.
Beyond emergency use, this battery pack is compatible with a range of small electronic devices that use the 26700 form factor. Power your desk lamps, portable fans, or digital cameras with a battery that offers longer life and safer operation than traditional lithium-ion batteries. Its stable voltage output protects your devices from power fluctuations, extending their lifespan.
In industrial settings, this battery pack provides auxiliary power for small lighting equipment, such as inspection lamps and machine-mounted lights. The high maximum discharge current (12A) ensures it can handle the demands of industrial-grade devices, while the LiFePO4 technology’s durability stands up to frequent use in harsh environments.
Our UN3480 certified battery pack meets international transportation and safety standards, ensuring it can be shipped and used worldwide with confidence. This certification verifies that the battery adheres to strict safety requirements for lithium-ion batteries, giving you peace of mind about its quality and reliability.
We maintain rigorous quality control processes to ensure every battery pack meets or exceeds industry standards. Each cell is tested for capacity (minimum 3900mAh), internal resistance (≤25mΩ), and performance under extreme temperatures. Our standard charging and discharging methods are validated to ensure consistent results, so you can trust that every battery will perform as promised.
Unlike generic batteries, this pack is specifically designed for lighting back-up applications. The 3.2V nominal voltage (mean operation voltage) is optimized for most lighting systems, while the 4000mAh capacity provides the runtime needed for emergency scenarios. We’ve balanced capacity, size, and performance to create a battery that fits seamlessly into your existing lighting setup.
The dual charging modes, replaceable form factor, and easy storage requirements make this battery pack incredibly user-friendly. Whether you’re a homeowner, business owner, or outdoor enthusiast, you’ll appreciate the convenience of fast charging, simple replacement, and low maintenance. No complex setup or special tools are needed—just plug and play.
LiFePO4 batteries are known for their long cycle life and resistance to degradation, and our battery pack is no exception. With proper maintenance (regular charging during storage), it will provide years of reliable service, reducing the frequency of battery replacements and lowering your long-term costs. This durability makes it a cost-effective choice for both personal and professional use.
The battery offers two charging modes: standard charging (0.2C/800mA) takes approximately 6 hours to fully charge, while fast charging (1C/4000mA) completes a full charge in about 1.5 hours. Both modes use a 3.65V±0.03V constant voltage method for safe and efficient charging.
For charging: 0℃ to 55℃ (60±25% R.H.). For discharging: -20℃ to 60℃ (60±25% R.H.). Note that charging below 0℃ may reduce capacity and shorten cycle life, so we recommend avoiding low-temperature charging when possible.
Store the battery in a cool, dry environment with temperatures between -20℃ and 25℃ (60±25% R.H.). Do not store for more than 6 months without charging—charge the battery once every 6 months, or every 3 months if it includes a protection circuit, to maintain optimal performance.
Yes! The 26700 form factor (26.3±0.3mm width, 71.0±0.5mm height) is a common size for many lighting devices, including emergency lights, portable lamps, and work lights. Check your device’s battery specifications to confirm compatibility, but most 26700-compatible devices will work seamlessly with this pack.
The battery supports a maximum continuous discharge current of 3C/12A, making it suitable for high-power lighting devices that require consistent, high-current output. It also handles a maximum continuous charging current of 1C/4000mA for fast, efficient recharging.
