495-48-11-1815 Features: -Battery Fuel Gauge - displays remaining run-time.-Milwaukee Digital Power Management - temperature management, overload current control and cell voltage monitoring.-Batt. Type: Lithium-Ion.-Batt. Cap.: 1.400 A-h.-For Model: 2601-22, 2650-20.-Type: Rechargeable Dry Cell. Specifications: -Equivalent run-time with 40pct less weight than an 18V NiCad battery.-Voltage: 18.00 V.