BAK 21700 4000mAh 3.6V Battery

4000mAh capacity combined with up to 40A continuous discharge supports high-drain battery packs, mobility devices, and professional-grade power systems.

3.6V lithium-ion chemistry provides stable voltage and strong energy density for portable power systems and backup power solutions.

Supports up to 6A continuous charge for faster, efficient recharge cycles in compatible battery assemblies.

Designed for high-output LED devices and professional electronics that require consistent current without performance drop.

Manufactured by BAK with scalable cylindrical cell production focused on advanced energy density and dependable pack integration.