... hours 3,Rated Current: 600mA 4,Sealed Ni-MH battery Pocketful & Handy Battery Operated Micromotor 20,000 r.p.m max. Item ... Complete Set Without Handpiece 01021 Controller 01012-1 Motor 01023 Battery Charger 01024 Unit Holder 01034 Handpiece Specifications Power SourceSealed Ni ... .3,Charging time with only 4 hours by the attached battery charger4,Continuous operating time with heavy load is 6 hours ...