Fenix Flashlight 18650 Li-Ion Battery (4000mAh)

Power flashlights, headlamps, bike lights, camping lanterns, and more with this 18650 Li-Ion Battery from Fenix. The cell delivers 3.6V of output power with a capacity of 4000mAh. It also has a protection circuit that safeguards against short-circuiting, overheating, and excessive charge/discharge current. Vents built into the battery expel gas generated by internal short circuits, in order to prevent the cell from inflating and exploding. The battery is designed to last for up to 500 charge/discharge cycles, maintaining up to 75% of its capacity after the final cycle.