Aren't the ring terminals gonna' be a pain in the rump whenever you need to change to the other battery ? (unless you wired the batteries together in parallel) If each battery has the ring to connector cable then the switch only takes a second. You just have to resist the evil temptation to connect...

Use some jumpers to see if your batteries will light up (brightly) an automotive headlight bulb or an old school sealed beam . If they do, it's gotta be your made-up harness. Continuity testers and jumper wires w/alligator clips are very handy for this type of troubleshooting.  BINGO! It was the m...

Problem solved! Finally I put my ego aside and asked, "OK, so what components here are not 'factory' or which did you modify in some way?" The obvious answer was that there was one cable I had to build because I needed round battery connectors on one end and a female cig socket on the other. I was 1...

Sorry to hear about your problem. I'm sure it can be sorted out out since there is essentially no difference between the AGM batteries and the car battery. First, a few curiosity questions: what actually are the batteries and how do you know they are 95% charged? And what is your "smart charger"? A...

Thanks, CapnLoki, that's exactly the kind of help I was seeking. You are correct that I concluded my new AGM batteries are charged based on the 13.1 volts, not based on a true load test, so that's definitely a possibility. Also, I had to custom build one piece of wiring; it has a 12V cig socket on o...

I've been on a PR Series 60 System One BIPAP for 18 months or so. In late June I'm going on a two-week camping trip on which I'll need to go maybe 3-4 nights at a time running from battery power. After considerable research, I bought two 35AH AGM batteries, the proper DC cable for my machine, and a ...

Like several others who commented, I use distilled water at home, but if I run out or I'm traveling, I go with tap water. Maybe I should reverse that because I'm fairly confident of the quality of my tap water at home, but if traveling that quality varies from town to town and hotel to hotel. Hmmmm?...