21700 Low Temperature Battery 3.6V 4000mAh

The ultra low-temperature lithium-ion 21700 battery 40L(4000mAh 3.6V 10C) is a great solution to address the temperature limitations of chemical power supplies.

With the great effort of Sunpower R&D center, this 21700 sunpower li-ion cell 3.6v battery can be applied in extremely cold environments. The low-temperature lithium-ion battery 40L integrates an advanced formula system and materials, with meticulous manufacturing processes. This breakthrough design enables the 21700 battery to effectively enhance performance for various applications.

1. Designed for extreme conditions, it maintains a remarkable -40℃ 0.2C discharge capacity of ≥85%.
2. Even in frigid temperatures as low as -50℃, it retains a discharge capacity of ≥70% at 0.2C.
3. Demonstrating excellent low-temperature cycle performance, it sustains over 80% capacity after 300 cycles(0.5C charge and discharge at -30℃).
4. Thriving in a -50℃ environment, it consistently delivers robust current and capacity.
5. The low-temperature lithium-ion battery easily handles low-temperature charge and discharge, enduring 0℃ charge and -40℃ discharge.
6. The low-temperature lithium-ion battery excels in low-temperature high-rate scenarios, boasting a capacity retention rate of ≥75% during continuous 5C discharge at -40℃.
7. Rigorous safety battery test is assured with low temperature over acupuncture, heavy impact, and other stringent tests.
8. Remarkable energy density of about 210~250Wh/kg is achieved in low-temperature conditions.
9. 18650 battery stable operation spans from a low temperature of -40℃ to 60℃.
10. The low-temperature lithium-ion battery maintains a discharge cut-off voltage of 2.5V and a charging cut-off voltage of 4.2V.
11. The low-temperature lithium-ion battery accommodates a maximum charge current of 8A and a continuous discharge current of 40A.
12. Compliant with UL/CB/SGS/BIS/PSE/KC/MSDS/UN38.3 certifications, eco-friendly.