MC wrote:

You don't know how to wire and solder a plug? You can get them
radioshack...



There are a couple of problems here MC, number one; does the
drill in question actually have a jack or does it use a removable
battery pack that plugs into a separate charger?

If it is the latter then a small inverter is going to be the
easiest solution to implement.

If the former, then you may have other problems; does the drill
contain charge control circuitry, or is it going to be necessary
to make some sort external controller, or should you just put in
a current limiting resister and take a chance on frying or drastically
shorting the life of the batteries?

Cheers
Marty