John, I went through this in detail in my earlier post (see the first post here for a link), so I didn't want to repeat all of that again (ad nauseam and bore people who had already read it). In short, the problem I was having was at took a long trip from Seattle to Los Angeles. When I drove a long stretch 2 to 4 hours, and stopped at either a rest stop, gas, or Walmart, when I got back, I got nothing when I turned the ignition key (no cranking, no clicking, no sound). I had over 12.5 in battery power, but nothing. Everything else worked. I managed to get it started twice (once with a jump, the second time by me taking off the cables from the chassis battery). When I reached a destination, and plugged in or hooked up my battery tender, it would start without a problem (hot or cold).

When I was in LA, I went to Pep Boys and bought some battery cleaner and some protectant. I cleaned all of the upper connections (in the front compartments). I did load test the battery. I charged it to full, and then cranked it with a meter. It held at about 12.7 after cranking, and didn't drop below 10 that I could tell when I cranked.