@johnbishop- I use the ResMed Air Sense 10 for both home & travel. It's stored in the typical gray carry case that I often see in many airports. Never had any issues with it as a carry on when flying. We went on a trip to an off grid lodge on the Rogue River in OR a few summers ago and there power is made with a generator and it comes on at 7 AM and off at 10PM. When I was looking into this for my C Pap they said they provide a battery and I just had to purchase a accessory to use for my C Pap use. It worked just fine! My brother uses C Pap as well and will often tent camp and found a small battery operated one that he likes very much, but I'm not sure of the brand name? Jim @thankful