I have the Elkridge 35QSQB with bunks in back and love. I use two group 24 12v batteries as I sometimes dry camp 2 or 3 nights in a row traveling. Before putting in 2 batteries I bought a new Walmart battery which was defective, took back and got a better walmart battery which was bad and replaced with a deca battery from napa and then added a 2nd battery. Very happy with 2 deca batteries.