Hikoki BSL1850 18V 5.0Ah Lithium Battery (TWIN PACK) The Hikoki BSL1850 battery is an 18V Li-ion sliding battery with a battery capacity of 5.0Ah in an extremely compact design. The battery is compatible with all HiKOKI and existing Hitachi 18V devices that require a sliding battery. To extend the lifetime of the HiKOKI BSL1850 18v Lithium Batteries, HiKOKI equips the battery with the protection function to stop the output. Recharge only with the charger specified by the manufacturer. Features: Full compatibility with Hitachi's 18v slide Li-ion tools 5.0Ah Li-ion Battery big power band up to 2 times longer runtime for the same weight 3 way protection including deep discharge and overload protection Fast re-charge plus energy saving Up to 1,500 cycles rechargeable through multiplex protection circuit that prevents overload, overcharge and over discharge Specification: Voltage: 18v Battery type: Li-ion, Slide On Capacity: 5.0Ah Weight: 0.6kg