I use a UPS much like that for my "server closet" to keep my file server, router, and a few other goodies running during a modest power outage. It would work for a cpap for a limited time: I think my "550" claims 165 Watts for 13 minutes, my PRS1 claims 80 watts with the humidfier (it actually uses ...

So I guess I'll stick with my hunch of a bad SD card. They're fairly reliable, but die the same way hard drives do: just at the moment of maximal annoyance. If its a simple file corruption, deleting files works. If its a formatting mess then reformatting helps. But for a small card, I would just fin...

I've been watching these threads and its time to jump in ... First, I want to thank Mark for his work and encourage everyone who uses SleepyHead frequently to send a donation his way. As a long time (now retired) software developer I appreciation the difficulty of coding for a large set of devices t...

I don't camp but I spend time on my boat where I run off of battery power. First, using a humidifier will be difficult with anything but a large battery. The second issue is does your xPAP run off of 12V? Most ResMed and PR units will run efficiently using a 12V cable that costs about $25. If you ne...

I checked into the two batteries, but the company does not supply full specs so a bit of guesswork is needed. It does appear that the replacement unit is equal or higher capacity. Although your REMStar shows a "5 AMP" requirement, most of that is for the heated humidifier. Any battery that you can c...

I've had Ocular Migraines since I was about 20, about once a decade at first, then increasing to once or twice a year in my 60's. They manifest as sharp zigzag patterns, almost like a bizarro comic book background, covering about a quarter of my vision mostly on one side. Though not painful, there's...

OK, I'll try the electro-math. I don't know how much power your PR unit uses, but the ResMed loads are outlined here: http://www.resmed.com/assets/documents/service_support/battery_guide/198103_battery-guide_glo_eng.pdf As a first cut you might figure about 1 Amp load without a heated humidifier, or...