The Fenix ARB-L21-4000P is a high output 21700 Li-ion rechargeable battery with a protection circuit in the anode to help prevent short circuits, over charge/discharge and over heating. The battery also includes pressure relief vents which expel waste gas in the rare case of an internal short circuit preventing an explosion. Recommended for Fenix LR35R Flashlight.
Compatible with: LR35R, ARE-D1, ARE-D2, ARE-A2, ARE-A4.