I worked 10 hour shifts to remove and replace literally hundreds of propellers on an airplane. It's almost silly to have a second battery because even on my toughest days I still have to use over 1/4 of a charge. Plus, it charges damn fast. Even if I managed to drain the battery (God help me, it was going to be a tough day), I could recharge it in a 30-minute lunch break. I've literally put all 225 pounds of my weight on this drill bit to loosen a stubborn 20rpm screw and it's never stalled, stuck, stuttered or stalled. torque. Per. days. battery for a day. A lightweight. belt holder. Tiny head size. Appealing trigger. locking clutch. Practical chuck with torque limiter. iron cartridge. 2 speeds. Rubber inserts on the handles. Not crazy loud. Useless light (should be real, right. Who even thought of that? They all suck at every exercise.)