Field expedient Battery

Quick and dirty.

Your target might not be an IPod.

http://www.youtube.com/watch?v=GfPJeDssBOM

pretty smart, electrolytes can be bought in build and in pill form for alot less than jugs of gatoraid. might be a good way to get an old radio rolling. I think making a hand crank charger that you can connect to a bike chain system is a good method for getting things charged up as well.