Deep Cycle vs Regular Starting Batteries

You mentioned in the other thread that you have two Duralast Marine Batteries. Those are known as "dual-purpose" batteries that can be used for both starting and deep-cycle applications. I actually own two of those same batteries myself. Mine are 7 years old. I have maintained them carefully, and they still test out at near-new capacity. A marine battery doesn't have the same type of deep-cycle capability as a set of golf cart batteries or an AGM battery, but they are fine for average use for an RV'r who doesn't camp very often without hook-ups. You might want to look up some online references like "the 12-volt side of life" or "battery university" to learn more. That way you can assess your power needs and decide what type of battery you want to buy when you replace the Duralasts.

Miles