Anybody thinking of picking up one of these new "personal" sized butane fuel cells?
http://www.popsci.com/gadgets/articl...onal-fuel-cell
They're not rechargeable, so that's a limiting factor, but they are a pretty decent size and apparently put out some good juice for a couple of weeks. Pretty useful if you're traveling in some remote areas. The article says they're not recyclable, though the creator says they are in the CES video, so I'm not sure about that.