I bought my coach used at two years old, and now it is four years old. Both original Trojan batteries have failed. I think that was brought on by the fact that both batteries were pretty much dry when I first inspected the coach after I bought it. They never were good for more than one day's dry camping. I could not find 6v deep cycle batteries in the Arizona WalMarts, but I got one at the Tucson Costco for $76 each exchange. Other than being a different color, the case and top look like they came out of the same plastic molds as the Trojans. The label said Johnson Controls. So far so good, and if they only last half as long as a Trojan or some other brand, the cost will be a wash. I paid $130 for a private brand battery last fall.
2017 Coachmen Orion, Ford Transit 3.7L: previous
'09 Pleasure Way Lexor, '05 NRV Dolphin 5342