Clean/Self-Contained Electric Power - Latest battery technology - AGM (Absorbed Glass Mat) battery, completely sealed.  Heavy-Duty Electric Motor, Switch, and Wiring System.  Dual Power Source - Operate from the on-board battery or connect to a vehicle with the supplied cable.  Jolt of Power - Jolt of Torque, Clean - No Fumes, Quiet, HTT - High Torque Transmission - Heavy-duty clutch for fast, solid engagement and a transfer of engine energy for additional torque.  HTT allows 30% more holes on a single battery charge.  XTTM Drill Assembly - Black D-Icer ARMOR, Black Powder Coated Finish, and Ripper Blade Ideal for Initial Drilling and Redrilling of Ice Holes.