I really like the idea of this flashlight, as it is almost impossible that you could ever run out of juice for it. This NoPoPo Eco Water-Powered Flashlight Set is powered by any liquid that you put in it. That means water, gatorade, beer, gin and tonic even urine. Not sure why you would ever want to put some of those things into your flashlight, but the point is, if you do it will power this thing. $45.
