Travel By Car
You can plug your Portable Oxygen Concentrator in to your car through the DC car adapter. The POC will charge the battery while operating. This gives you the freedom to travel across town, or across the country, without worrying about running out of oxygen.
It is recommended that you disconnect the POC from your car when the car is off, so the car battery isn't drained, and when starting the car, so the POC isn't damaged by potential voltage spikes.