Boat owners can get a free battery test before the start of the fishing season. I would recommend going to either advanced auto parts or autozone, and they have a car and boat battery test machine that they roll out to your car or boat trailer. It is a free service. We can do this on Saturday. They test it in front of you and were honest with me. I had gone to another local place for an oil change and they told me to get a new battery, although it was working fine and I only wanted an oil change. Advanced auto parts test guy said my battery was fine and it worked a couple of more years before it eventually died at the boat ramp park. When we called triple-a.