I have had sleep apnea and used a machine for over 10 years. I don't use a cpap though I use a bypap as I have a hard time exhaling with the cpap. I also use just the nasal pillow as I couldn't get used to the mask covering my nose and mouth. I take mine on vacation with me and even camping. We bought a Dc cord to interchange with the AC cord and it doesn't use very much power to run from the battery.