Fenix 3500mAh 18650 Micro USB Rechargeable Battery The Fenix 18650 rechargeable battery combines a 3500mAh rated capacity with a 3.6V voltage specification. Its Micro USB charging port is built into the battery, providing a direct charging connection. The 18650 format identifies the battery size class to match to a compatible device, while the capacity states its charge-storage rating. The rechargeable design allows the cell to be charged again for repeated use in a compatible device. Micro USB specifies the charging connector type. Battery size and voltage remain separate from capacity, so all three specifications matter when selecting the correct cell. The black appearance identifies the stated configuration. Key Features Rated capacity: 3500mAh charge-storage specification. Micro USB port: Built-in charging connector. Rechargeable format: 18650 size-class battery. Voltage: 3.6V specification for compatible devices. Specifications Manufacturer: Fenix Size class: 18650 Capacity: 3500mAh Voltage: 3.6V Charging port: Micro USB Color: Black Shop the Fenix 3500mAh 18650 Micro USB Rechargeable Battery at BattleHawk Armory.