I tried a "jump start" box about a year ago, but had problems since it was a "starter" battery and not a "deep cycle" battery. I basically forgot to charge it once and then it went dead on me. I don't think this would work for an airplane but camping for $25-$30 it even already has the lighter plug ...

I had my first camping trip this last weekend since becoming a CPAP user, and I figured I should share my success story. I did a great deal of research into the problem of camping with a CPAP. Here were my requirements: 1) Must power my GoodKnight 420G for at least 8 hours (no humidifier) 2) Must be...