My batteries usually average 5 to 6 years. I try to go with a mid range cold cranking amps, battery. They seem to hold up much better and longer than the high amp ones.
I lucked out on the batteries for my diesel pickup last time. I was fixing to pull the camper to Pennsylvania and stopped by a NAPA store for some oil and windshield washer fluid for the trip. Came back outside and the pickup wouldn't start because the batteries were dead. So replaced them right there. Good Lord takes care of us old fools! I can just see the problems I would have encounter if I had pulled off the road in the middle of nowhere to take a leak, and the batteries had died.
