I'm a lineman by trade. I have seen a lot of cordless drills chewed up, battery issues, on and on. We use these drills for a lot of different tasks, but the toughest on all of them has been drilling holes in power poles. With that said. The 20 volt DEWALT lithium battery drills have hung the best abuse wise and battery wise so far. There is always bigger badder and better out there. We just got a Milwaukee and I cannot say much for it yet. But so far it is looking to run along side of the DEWALT.