Carya

fonda, it would not seem practical to use an old cordless drill with a power supply. These drills require so much current that an AC power supply (to provide 12 to 18vdc) would be large and cost-prohibitive. The batteries used in these tools have very low internal impedance and pump out several times the rated amps/hour in current. For a tool with a 3AH battery, it might be 10-20 Amps under load. That will still provide less torque than a new corded.

One of those car batteries in a cart with the automatic (120vac) chargers would work but only with heavy guage wires to the drill. Again, seems impractical.

If you cannot find replacement batteries for a cordless or have the internal cells replaced, time to junk it.