I used this for removing lug nuts and suspension bolts from an RV, 1 5/16 and 1 5/8, torqued to 400 ft/lbs and 500 ft/lbs respectively. No way I could move them by hand even with a 40" breaker bar. This thing did get them off, after a little work.You need to be a little patient using this, it broke the bolts loose but it took a little while. They moved very slowly at first. There are 3 settings, and the third one is full power until it breaks loose then slows down to spin the nut off. A nice feature with lug nuts.Overall battery life was good. I was using a 6Ah battery and didn't need to charge until I was all done, with wheels at all 4 corners, plus the u-bolt shackles, off and back on. Still had 3/4 of battery left.This thing is fairly heavy but no surprise given the torque it generates. And it wasn't hard to hold in place. I had to add a 10" extension for the dual rear wheel lug nuts because of limited clearance but no issues there.