Boiling Your Batteries?

Last week while I was traveling Leo wrote in with a good question about his boat's battery. His query came from a statement I made some ten years ago when I wrote the updated edition of the book shown here: By the way, you can get your own copy of this book or any of my books by clicking on the link at the lower left side of this page. Once at the Amazon site, click on Minor Brotherton's name to get this book. Ok, so now that I've made the shameless plug to try and sell some more ...