How do you determine the amp/hour rating of a deep cycle battery? I was at Wally World yesterday looking at batteries and not one (marine, car, motorcycle, none) were rated in amp/hours, milliamp/hours or any other understandable fashion. At least not by us 'normal' electrical folks. How does one determine the capacity of these batteries? Is there some sort of special code I should be looking for, and how is it translated into something that makes sense?