There is a relatively new Cpap / BiPap BATTERY System being offered that will provide power to run a Cpap device for Up To TWELVE NIGHTS on each charge. (It is fully rechargeable for repeated uses and will last for many years). It is much cheaper than the Li-Ion batteries other places sell and has a much better warranty (2 yr - full replacement). This is also great to take Camping (not backpacking, it is too heavy to carry that far).
Questions are always welcome and Cheerfully Answered without any sales pitch! You will be surprised and delighted. If you choose to buy, there is a 30-Day return privilege for full refund if you change your mind after testing a Battery System out.
You can find these on this website: www.CpapPower.com
This system is being recommended by numerous In-Home Health Care Agencies to their in-home clients because it is such a great value for the price. It can’t hurt to check it out and get your questions answered.