Specifications of Battery: Voltage: 24V Capacity: 4000mAh Type: Ni-MH Gross weight: 1300g Specifications of Charger: Input voltage: 100-240V Input current: 0.8A Fit Voltage: 7.2-24V Output: 36V / 1.5A Type: Ni-MH Compatible Battery: HILTI: 24V B24, B 24/2.0, B 24/3.0 Applicable Machines: HILTI: SFL 24, TE 2-A, UH 240-A, WSC 55-A24, WSC 6.5, WSR 650-A, WSW 650-A Tips for Battery: The battery is suggested to be charge and discharge three times first to get the best performance. The battery should keep cool down before charging. The battery should be used at least once a month. Don't let it lay idle for a long time. Tips for Charger: LED light stays red: Being charged LED light stays green: Fully charged LED light flashes red: Poor or reverse connection, high temperature etc.