I have realized that the fridge can really chew up the batteries, even on gas. There is a switch that operates a 12 volt circuit for keeping condensation from forming around the door jam when it's real humid. I was getting shortchanged on battery life (dual batteries) until I turned the switch off. My battery life more than doubled. I have never really needed to run the condensation control so it made no difference in the performance of the fridge. My switch is located on the upper part of the door jam. If you find yours turn it off and see if that improves your battery life.