On Tue, 8 Jun 2010 13:42:27 +0100, David WE Roberts wrote:

One major problem with lower end drills is the 3+ hours to charge plus
the requirement to then take them out of the charger after the 3 hours
to avoid damage.

Find a motor driven time switch. Open it up and connect the motor
after the switch contacts. Plug the charger into it and set to run
for 3hrs (or whatever) when it switches off the charger and it stops.

Simples.

--
Cheers
Dave.