Some day, that "where do I plug-in my blow dryer" joke I heard on my first trip will have a serious answer!

Luddite here calling DD or anyone, assuming that they make AA USB chargers, do they work at all? Do they eat batteries or is there enough left over for a depth finder?

The reason I ask is my kid's iTouch does sound and video better than my other options, she's lost interest in it and her phone wouldn't do me any good anyway. Plus it's small and light and something deep inside me wants to ask Siri where am I, how do I get to whatever portage/lake...?

Sorry about that. ;)