Here is the situation, I have a boat with a 12 volt power system, and no easy way to charge it. What I do have is a ton of ready to use 20 volt power tool batteries for my cordless DeWalt tools. There HAS to be a way to use my 20 volt tools to power my 12 volt sailboat electrical system. At least I think there is. With a few parts and some trial-and-error we figure out how to make this work in today's video.

And a link just for Higgypig!

https://www.amazon.com/Converter-20V-...