idaho, your mistake after filling with water was going to the high rate charge. Auto chargers suck at bringing really low batteries back up. Switch to slow charge and go a day. Then put an actual volt meter on them.
Truck: 2006 Dodge 3500 Dually
Camper: 2007 Eagle Cap 850
Boat: 2003 Jetcraft 2125 - Yamaha 150 HP & 8 HP Kicker
I would just replace them - Sam's Club is a good place to look, pretty cheap. My MH has two 6v Trojans that (like most) are out of sight in a box under the steps, and there was no gauge or display to let me know what the status was... My inverter has the charge wizard so I know they're being charged, but how much?
The best advice I got on this subject was to buy a 12v meter and attach it directly to the batteries. Mount the display so you can easily see it. I just bought a little power inverter with a digital display so that I can keep track of how there's doing - much more peace of mind. Now I can sit here and see the display jump-up when the charge wizard kicks into high gear. And I check the water level at least once a week like clockwork.
just my take. I realise that a lot of folks are on a budget but when your batteries go bad or you run out of juice while dry camping, your TC just turns into a expensive wooden box with a mattress in it. I just can't see going cheap on the very thing that makes the TC run when I can't use the generator of plug into shore power. I have no problem sinking a good chunk of change into two of the largest high perfoming deep cycle batteries that I can fit into the compartment
03 F350 Diesel 4x4 Crew Cab long bed, 08 Lance 1055, Rancho 9000xl, Air Lift air Bags, Torqlift tiedowns,stable loads, super hitch, 48" super truss, Toyo 285/75R16 Opencountry HT