The Hitachi BSL1830C 18V compact 3.0 Ah lithium ion (339782) battery is powerful, compact, long-lasting and fits a variety of Hitachi 18V slide-type power tools. It delivers increased productivity and runtime thanks to its 3.0 Amp hour capacity. Its compact design reduces weight and improves balance to cordless tools without adding to user fatigue. For protection from the elements, this battery features a resin coating. Its complex circuitry also prevents damage from overload, overcharge, and over-discharge of the battery. The BSL1830C battery charges the fastest on charger model UC18YSL3 (30 minutes). Other compatible charger models and charging times include: UC18YFSL (45 minutes) and UC18YKSL (90 minutes) (chargers sold separately).