I'm a remodeling contractor and use this drill EVERY day. I drive screws, drill 3/4" holes, stir 5 gallon buckets of joint compound & thin set. This drill just never stops. My subcontractors scoff when I hand this drill to them to mix heavy joint compound and then are amazed when they're done and I take it and keep working. I've had this drill for 5 years. The batteries are still good (but starting to show their age) and I usually only need to switch batteries once during the day if I'm doing heavy work like 3/4" holes with a spade bit. It's been dropped off of scaffolding, kicked and rattles around in the back of my pickup. I'll buy another one the instant this one decides it's had enough. For now, it's still going strong.