The link in the OP has the 8D that first acted up. Seems it is more of a "standby use" than a "cycle use" battery as it has turned out. The specs don't really say. I thought it would be a good deep cycler, which it seemed to be at first. If I take it out of the RV it will go in the garage as the standby power with inverter we use for short time power failures we get here sometimes in the winter. The two 27DCs have been doing that. So not a total loss.
The two AGM 100AH ones are supposed to be actual deep cycle. Three years old now and used hard but not mistreated especially. I got them to go in the truck camper where I had to have them inside and Wets would not work, what their fumes. (Did have Wets there at first and they set off the LP alarm when being charged)
I keep having mixed battery banks over the years what with one thing and another. Never had four new batts all the same and just stayed with that.
I suppose the free, used T-1275s I got that lasted five years makes up for these AGMs not lasting, so I can't complain about costs really.
I am thinking of going back to cheap 27DCs that will last a couple years at least, now that I have learned how to get them properly charged up after doing 50-90s. Had a lot of trouble with them last time I tried 27DCs, but Mex has since described how to do it. Also now I have chargers that will do that process.
I don't have to keep the batts inside the MH, so I could go back to Wets ok for fumes. We'll see.
Probably no sense paying big bucks for batts that don't last me any longer than the cheap ones, even with all the proper care routines I do. Boo hoo, it sucks to be me, etc. :)
