We are south of Tucson, so yeah, it’s hot. We have a standard, dealer-installed battery in our Lance 650, three years old now. We pull the battery disconnect in the camper whenever we park it in storage. (We splurge for covered storage.) We make a point of taking the rig out at least once a month to exercise it and when we do so, we re-connect the battery and let it charge. So far, it works fine.