Cordless drill driver series bosch gsr battery voltage 18 v battery capacity 15 ah number of batteries with 3 batteries type of battery li ion battery management replaceable battery gear 2 speed tool holder keyless idle speed max 1 900 rpm max drehmoment hart 45 nm weight 14 kg integrated torch drill diameter in concrete 13 mm drill diameter in steel 8 mm drill diameter in wood 38 mm charging time 45 min chuck width 1 5 13 mm torque lev