From http://www.engadget.com/2008/08/11/canon-patents-fuel-cell-dslr-were-ready/ Question: You're on that dream vacation in Northern Botswana photographing exotic wildlife when you run out of fool cells, WTF do you do? Or, you're on assignment photographing the troops in Afghanistan or hikers up Mt. Everest, or...whatever. How the fuck are you supposed to get replacement fuel cells? Canon might want to think this through a little more. Hey Canon, how about throwing some R&D cash toward better AF systems and higher ISO rather than frivolous fool cell crap?