I'd buy a different drill.
Probably this one that DIY Diva loves.
We'd always had a Craftsman 19.2v cordless. It was serviceable and worked well, so early in the project we decided to get another one and thus be able to use the same battery. Makes sense. Back in the day, the big issue was running out of juice and needing extra batteries. Things are better now and charging happens faster than ever, but still, an exta battery is good. The thing is, the drill was a poor fit.
Poor fit how?
First, it was a poor fit for the job(s). The craftsman is pretty big and pretty heavy. We were up on ladders a lot and working in tight spaces often. This drill is geat for doing a deck or a number of straight forward jobs, or occasional use. For our purposes, it was a bit unwieldy and heavy requiring some unnatural positioning and some precarious perches on ladders, etc.
The drills were also a poor fit for our hands. Neither of us is large-handed. That means that my thumb doesn't easily get up to the reverse/forward button without some unatural twisting of the wrist. For Mrs. OrDie, it's a two handed job in many instances.
So the long and the short of this is over a year and several months of work, we've driven hundrends and hundreds of screws, often in ergonomically incorrected or damaging positions. The upshot is that both of us have arm and elbow injuries that just don't want to heal up. The injuries are similar to tennis elbow in part, but there are also some funny tendon issues from twisting our arms. Both arms, I might add. As our right arms got screwed up, we just learned to drive screws left handed. Then our left arms got screwed up.
I really wish I'd coughed up the extra dough for two of the small powerful makita drills. I'd be feeling much better now.
The lesson learned is this: keep the scale of your project in mind and don't just try to work through something that's not quite right. That's fine for 10 screws. We drove over 600 tapcons, plus pre drilling the 2x4's, plus screwing 1x3's (1200 or so screws, I'm thinking) into the uneven ceiling joists, plus all the funky little jobs that we don't even remember any more. If you're straining or using bad form with that many screws, you're going to develop a repetitive stress injury.
Make sure you get the right tool for you to do the job and not get hurt. Next time, I'll do that differently.