Last year, Elon Musk of Tesla Motors revealed info about the Tesla Powerwall. It’s really cool, and is a lithium-ion battery with a built-in charge controller and it’s great…. Except that it is, of course, expensive.
So, leave it to the do-it-yourself community to find a way to make one ourselves, at a considerably lower cost. I really don’t have much to say about this one, except that your results may vary. What it boils down to is that you can buy old laptop batteries and use the cells in them to build your very own Tesla Powerwall, and do it at a fraction of the cost.
Watch the video below and he’ll explain: