Fenix ​​ARB-L21-5000U Rechargeable Battery

ARB-L21-5000U To be rechargeable battery High capacity 21700 USB Li-ion is built for more power and longer runtime. This battery has its own USB-C charging port for fast, easy charging without the need for a separate charger. Additional features include a protection circuit in the anode to help prevent short circuits, over-charge/discharge, and overheating. Pressure relief vents expel exhaust in the unlikely event of an internal short circuit preventing fire or explosion. Battery capacity up to 5000mAh. 500 charge cycles. This product will only operate in lights that support 21700 batteries. USB-C charging cable NOT included. Important Note: THIS BATTERY IS NOT COMPATIBLE WITH 18650 RECHARGEABLE LIGHTS OR OLD STYLE CHARGER. COMPATIBLE CHARGER IS A2, A4, D1, D2 .