Multi tool tool in new design compact and ergonomic with ez twist for easy and fast tool change the dremel 8100 is the practical aid for all areas where you have to work without cables with precision control for variable speed setting and fast charger 1 hour technical specifications battery voltage 72 v battery capacity 13 ah charging time 1 h weight 0413 kg length 22 cm width 35 cm depth 55 cm no load speed 5 000 33 000 1min battery technology lithium ion ecp