I found in the manual the size of battery and bought a marine gel battery. It lasts a few nights on a charge, but I don't think mine operated at the right pressure on the battery, I felt like my lungs were being over inflated. Another issue is air temperature. I did this the first time in winter here. This was a cold night in central california and it got down below freezing. The cold compressed air is really uncomfortable. My lungs felt like they were being assaulted. Also when camping be sure to keep track of your altitude and learn to adjust your machine for how far you are above sealevel. Since then I've lost a lot of weight and don't need to use CPAP.
Kayak & Canoe Outriggers
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