We had Makita drills in my high school and they were great. The battery life is good, as is the power (I'm using really old Dewalt drills right now, and the amount of effort it takes to screw something in with those compared to the Makitas is very noticable). They also have LEDs near the bit, which is helpful when you're working in the dark, since you don't have to juggle a flashlight.
One thing that was very helpful, as avkid mentioned, is the impact driver.
We also have the corresponding flashlights, which are convenient. One of my ASMs liked to borrow it to keep at the prop table during the run.