Cordless drill driver series bosch psr battery voltage 144 v battery capacity 15 ah number of batteries with 2 batteries type of battery li ion battery management replaceable battery gear 1 speed tool holder keyless idle speed max 450 rpm max drehmoment hart 28 nm weight 11 kg drill diameter in steel 8 mm drill diameter in wood 25 mm charging time 60 min chuck width 1 10 mm torque levels 20 1 max screw diameter 8 mm special feature