The Fenix USB rechargeable battery ARB-L18-2600U 18650, 2600mAh lithium - ion battery is specifically designed for high intensity led illumination use and is the perfect companion for all current Fenix 18650 powered lights.
The 2600U is a highly versatile battery that can be charged in a regular Li-ion charger or, for those customers who already have a charger with Micro USB lead such as a mobile phone charger, the micro USB can be plugged directly into the battery, saving the expense of an additional charger. The Fenix ARB-L18 2600U battery even features its own built-in LED indicators for charging / charged status.
ARB-L18-2600U battery features:
High capacity (2600mAh), great reliability and compact design
Triple overheat protection including relief vents for safety and reliability
Built-in over charge, over discharge and short circuit protection
Impact resistant structure
Protruding positive contact allows use in series
USB charging lead / charger not included