Re: Battery power pack
I used to have one, nice to not have to position vehicles to jump, or to drag out to the barn for the John Deere. After awhile they won't take a charge, and I don't think they're useful for really dead batteries, just where you're a little under powered to start... I think good battery maintenance and understanding your isolator/separator (which kind, how to jump, how to ensure the starter batts aren't being drained by the house functions) is a better solution.
I almost hate to plug it, because the development is not going well, but this is the kind of thing I'd really like to see documented in the upcoming Wiki.