Hitachi BCL1015S 10.8 to 12V Volt Peak 15Wh Weighs Only 0.9 lbs. 50% Lighter Than Most NiCd Batteries Compatible With UC10SFL & UC10SL2 Chargers For Use With DS10DFL, WH10DFL, UB10DL, DS10DL, GP10DL, WH10DCL, DJ10, & WH10DFL2 Tools Quantity  (1) BCL1015S Battery (Replaces BCL1015 #331065)