The Fenix ARB-L18-3500 18650, 3500mAh 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 3500 is a highly versatile battery that can be charged in a regular Li-ion charger.
ARB-L18-3500 battery features:
High capacity (3500mAh), 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