The Metabo HPT 382311M (BSL1820M) is an 18V 2.0Ah lithium-ion battery with a fuel gauge for Metabo HPT 18V slide-type power tools. Its 2.0Ah capacity gives up to 30% longer run time than the BSL1815X 1.5Ah battery, and the fuel gauge indicates the remaining battery power level. At 0.84 lbs it is lightweight, a resin coating protects it from the elements, and multiplex protection circuitry prevents damage from overload, overcharge and over-discharge. It is covered by Metabo HPT's two-year lithium-ion battery warranty and works with the UC18YSL3, UC18YFSL, UC18YKSL and UC18YTSL chargers (not included). • 18V, 2.0Ah lithium-ion slide-type battery • Fuel gauge shows remaining battery power (4-stage per Burns Tools) • 0.84 lbs; resin coating • Multiplex protection circuit against overload, overcharge and over-discharge • Two-year battery warranty; charger sold separately