Okay so I'm going to repeat stuff so I understand it, and also list some products to make sure I've got the right ones: This is what I use to "charge" right now https://www.amazon.com/Battery-Tender-021-0128-Maintain-Damaging/dp/B00068XCQU - says it is normal battery tender + charger, but you recomm...

I use a battery tender to charge it

Okay, so as I understand it, my battery is too weak now. I need a new battery, but need to keep that battery above a certain capacity or else the same thing could happen?

So it looks like my battery fluctuates between 11 and 12 when I test the red/black connection. Then when I test it while running the CPAP it seems to stay consistently at 11, I checked for a couple of minutes but didn't experience the shutoff during that time. Although, the tester I own already only...

Yeah fully charged battery, maybe a year old. I did notice the light went orange and green depending on if I was exhaling or inhaling, which seemed weird. I have tried my deep cycle battery directly connected to the air mini converter and plugged into a piece I had with my old setup that had the re...

Yeah fully charged battery, maybe a year old. I did notice the light went orange and green depending on if I was exhaling or inhaling, which seemed weird. I have tried my deep cycle battery directly connected to the air mini converter and plugged into a piece I had with my old setup that had the red...

So I got the AirSense DC/DC to use with my deep cycle battery for camping with my resmed 11. It powers up, runs for awhile but intermittently shuts off - not sure if that is the power threshold you were talking about Scott. I don't know if you have recommendations for settings or to improve my setup...