Master Mechanic, 18V/20V, 1.3Ah Lithium-Ion Battery & 18V/20V, 1 Hour Lithium-Ion Dual Charger, The Ultra Compact Battery Weighs Just One Pound & Can Be Fully Charged In 1 Hour, The Lithium-Ion Battery Can Be Used To Upgrade Current 18V NiCad Master Mechanic Power Tools Which Are As Follows: TV #134-453, #134-455, #134-456, #134-460, #134-474 & #134-475, The Dual Charger Works With Both Master Mechanic 18V Nicad & 20V Lithium-Ion Batteries.