mlts22 wrote:
I wonder if one of the "battery packs" that is often sold might help, although most of what I've seen have been pretty skimpy. I'm sure someone could make a bundle by getting a good 12 volt AGM battery (so venting isn't an issue), a good PSW inverter, and a multi-stage battery charger, and putting this in a decent looking case.
the ones sold as I mentioned in a previous post are lithium ion and the medium sized one weighs only a few lbs and will run my CPAP at least 3 nights. BTW this setup is likely much smaller and lighter than a 12V AGM battery and can also be carried on an airplane.
and it can be recharged from a 12V source, car, or 120V AC
http://www.batterypowersolutions.net/