Just an idea, I would take the new ones you just got and have them tested at the same place. It might provide some insight into if the load test is really valid or not. If it comes back bad you might want to have them tested at a battery specific place. I know Interstate Battery has battery centers all over the country that specialize in just batteries. You might get someone with a bit more knowledge doing the test. If the new ones test good, well my idea is totally worthless,:B and its back to looking at the camper.