Cordless drill driver series bosch gsb battery voltage 18 v number of batteries without batteries type of battery li ion battery management replaceable battery gear 2 speed tool holder keyless idle speed max 1 300 rpm blow count max 4 800 countsmin max drehmoment hart 50 nm weight 17 kg charge indicator integrated torch drill diameter in concrete 13 mm drill diameter in steel 13 mm drill diameter in wood 38 mm charging time 45 min chuck