Not to nitpick so much, but how to apply large amounts of amperage without lots of voltage to push those amps through? Better that those drill manufacturers switch to LiIon instead of the 60$ NiMH that I am buying now. As far as the pickle thing, I’m going to try that, but since the a.c. line switches polarity 60 times per second, there really is no + or - . Freegards.
On the pickle...use a galvanized nail(zinc) and a copper electrode for best results.
Caveat: I dont condone this ;0)