Most people who suffer from Sleep Apnoea can go up to a few nights without CPAP with minimal effect. But you should always check with your doctor that this is OK. When not using CPAP your symptoms will return, so most of the time it is more practical to use a power pack or CPAP battery. Most machines run on a 12 volt battery and there are also accessories such as power cords to connect your machine to a rechargeable battery or a car lighter socket if you are on the road. Some CPAP machines are designed for travel and include rechargeable battery packs.