Cordless hammer drill number of batteries with 2 batteries battery management replaceable battery series bosch gbh gear 1 speed tool holder sds plus weight 46 kg idle speed max 940 rpm blow count max 4 200 countsmin drill diameter in concrete 16 mm drill diameter in steel 13 mm drill diameter in wood 30 mm power supply battery operation battery capacity 4 ah impact force 32 joule included in delivery 2 batteries l boxx quick charger keyles