The BLACK+DECKER LCS40 MAX Fast Charger, 40-volt is designed to charges BLACK+DECKER 36v or 40v Max batteries in under 2 hours. This unit charges LBX36 in 1 hour, LBXR36 in 1.5 Hours, and LBXR2036 in 2 hours. The charge indication light lets you know when your battery is charged! This LCS40 charger fits all Black & Decker 36v or 40v Max lithium ion tools. Maximum initial battery voltage (measured without a workload) is 40 volts. Nominal voltage is 36.