Well, learn something new everyday, figured the diesels just one big ol' battery (special order type).
And now that I learned something new, an old bit of knowledge got deleted, wonder what I forgot?
I guess they figure you can pick up 2 batteries, one at a time, and run them parallel easier than manhandling a huge one? There are some huge marine batteries around...I can barely pick one of those up, much less carry it anywhere.
Not sure what I forgot today, but I know it's something...OTOH, I'm pretty sure I don't use my brain that efficiently to start with! So hopefully it ain't full yet :-)