Dremel 760-01 760-01 Dual Voltage 4.8-volt and 7.2-volt 3-Hour Battery Charger for Dremel Cordless Rotary Tool Models 7700 and 7300 For use with Dremel rotary tool models 7700 and 7300 Has a three-hour charging time Charges both 4.8 and 7.2 volt batteries