William Krems wrote:

Another reason is recyceling, those tools will go to the dump
otherwise.
I don't understand the 12 volt setting working on the 7.2 and 4.8 volt
tools but I've used them several times with no problems, no heating up
or anything.

I wouldn't be too if there was a voltage regulator in the tool.

--
Morris Dovey
DeSoto, Iowa USA