I buy most tools at Sears. I'm not out to impress people, just to get
the job done.

Scotty, Sears sells some crap too. Why do you want a drill that works from your
batteries, rather than a standard charger model? The Makita classic II (for
example) comes with two batteries. Both would give you plenty of usable drill
time and you small inverter could charge one while you use the other. You're
not likely to run out of power for the drill.

RB