Bill, I've just been searching up information about the battery because I think I destroyed another battery in my TM, and I'm just reading this subthread about batteries here.
You have a very good and thorough discussion about batteries here:
https://www.trailmanorowners.com/for...ead.php?t=6051
And, buried in the forums I came across a battery protector Victron BP-65 (post #31):
https://www.trailmanorowners.com/for...t=19102&page=4
Bill, I think a brief recommendation for battery protectors in your thread may be of value. In our trailers, battery maintenance can be difficult because our trailers collapse in such a way that it is not possible to even test the battery.
If we are disciplined like you Bill, we'd all remove the battery for the winter, store it in a cool but not freezing place, and make sure it remains charged. I, on the other hand, am not disciplined, and have left 2 batteries so far to die a slow death in my trailer each winter. I suspect I'm not alone in this.
To demonstrate how undisciplined I am, I must note that Padgett told me to get one 2 years ago!