Full Charge - No Charge!
Using the monitor on the range hood my batteries will show a full charge faithfully for two or three weeks and then, the next time I check, they're deader than a doornail! I've yet to catch the monitor in a 3/4, 1/2, or 1/4 charge state. I plug the trailer in for two or three days and the batteries are good to go again for the next two or three week period. This, of course, is while the trailer is sitting inactive in my drive. What's causing what appears to be a sudden death of the batteries? I'll admit that it could occur over the period of a week or so when I fail to check the monitor - but this has been going on for some time now (---most of last winter) and I just find it peculiar that, like I said before, I've never caught the batteries in a partially discharged state.
2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074