The DeWalt DC9181 18-Volt Compact Lithium-Ion Battery brings more power in a lightweight, compact design. The DC9181 is capable of producing 800 cycles — two times more than other batteries. This Lithium-Ion Battery gives your more runtime per charge for the ultimate in cordless tool power. Features:DeWalt's Lithium-Ion cells deliver more recharges than any other formula of Lithium-Ion testedExtremely lightweight, weighing in at only 1.5 pounds, it weighs the same as a 12-volt Ni-Cad batteryNo memory and virtually no self-discharge for maximum productivity, less downtime and longer shelf-life when not in useDewalt-designed electronics cycle life and cell protection for strong performance and durabilityCompatible with most 18-volt DeWalt tools and accessoriesRequires Lithium Ion compatible battery charger (sold separately) What's In The Box:DeWalt DC9181 18-Volt Compact Lithium-Ion Battery