Thanks for the info, I looked them up on Bob Nuckolls Matronics
website, and found some info he wrote a while ago about the Odyssey
dry cells. He claims they are nothing but RG batteries that have been
tweeked for deep cycles, which isn't really needed in Aviation uses.
More for Marine. He didn't mention why their shelf life is longer.
But then, maybe they are no better than other RG batteries in that
department. He claims calling them "dry cells" is pretty much a play
on words. It sure did mislead me. Actually, their calling their
produce a Dry Cell, when it's nothing but an RG is bascially false
advertising. Now I'm not so sure I want one of those, any more than
other RG offerrings.