Sorry to hear about your troubles. When you get a new battery, if you go the conventional lead-sulfide route, you can't go wrong with a Trojan. We upgraded to a Group 27 soon after we bought our trailer in '12. The thing is 100% MADE IN USA, and holds a charge very well. We regularly check the water level in the cells, and pull the battery and connect it to the minder after every camping trip. Other than that, we forget it's there.
Matthew and Lisa
TT: '02 T-2363;
TV: 2012 Ford F-150, 4x4/Off-road, 5.0L V8, "Big Gray"
Reese Straitline w/ dual cam