I may be wrong but I think a 12 charger puts out about 13.5 volts in order to drive the battery to charge. You can check this out with a volt meter.
What I want to do is use the old cl. Drills for something. I have already replaced them with newer better drills with torque adjust and variable speed.
it just seems a waste to toss the old ones when the motors gears and switches etc are still useable. Just keep thinking reading and sharing.

And variable speed