Apexium INR 21700 4000mAh 3.6V Lithium-Ion Battery

High Working Voltage --- Supply to various high power electronic devices. Apexium INR Cells can provide stable voltage for your device effectively to avoid the risk.

High Energy Density --- 4000mAh makes more energy density than normal 21700 cells. Much more powerful performance.

Long Life Cycle --- Available to make long cycle life battery packs, which extends the cycle of life over 1000 times.

Low Self-Discharge --- Self-discharge range only at 5%~9% which is much more helpful to prevent from power loss.