He asked about a 12 volt drill and 12 volt rechargable batteries. You
can easily modify the AC charger that comes with it so it can be used
with a cigarette lighter plug. No adapters needed.

Good point, but he shouldn't bother with the crummy Seafit drill. Even on a
boat, a good drill is worthwhile. My Makita has taken a beating, still works
great. The head of the B&D rusted when I forgot to hit it with oil, but I saved
it. At the slip I tend to use an ancient Skil drill, built like a tank.

RB