What is the best iCharger that charges from AA batteries?
I’ve had “decent” experience with this one with an iPhone 3GS. 

I’ve brought that one after reading from someone who actually tested it; you can find his little post: Here.

I didn’t test with all those batteries, but I can say that a pack of 4 AA batteries will charge the iPhone from 10-20% to 100%, but the batteries were drained in the process. An expensive idea… but a life saver if you really need it. 


  But for long trips away from power
  sources, non-rechargeable lithium AAs
  are by far the best