The Rural King battery is not a deep cycle battery and, for $69, probably not good for more than a garden tractor. Standard lead acid starting batteries are not a good choice for RV use and deep cycle batteries are not that good for starting tasks. The cheapest solution for deep cycle batteries (not hybrid and not starting batteries) are 6V golf cart batteries sold at Costco or Sam's club. For the vehicle's system, look for the most weight/$$. FWIW, I payed more for a replacement battery for my truck than was necessary but chose the same Motorcraft battery that was original. My choice was based on the 10 yrs, 1 Mo. of service I had with the original.