Any of the batteries we received from the dealer were 12 volt car, or at best a so called hybrid RV battery. In either case they just can't deal with being drawn down time and again if you do lots of RVing off the power grid. If you mostly camp hooked up to a power pedestal any type of battery would suffice. Since we most often attempt to boondock or drycamp we found golfcart batteries give more bang for the buck. We purchase our GC2 6 volt batteries from Samsclub, we use a smart charging converter or inverter charger to keep them happy.