Dh has sleep apnoea so needs to bring a CPAP machine with him everywhere he goes. A battery pack for it costs hundreds so EHU it is.
What will I need? I don't intend to bring any other appliances that need EHU. Just want to be sure as I have a habit of buying what I think is the right thing, only to find it's the wrong thing or that you need another thing to go with it.