Awesome, I got to get back to looking ASAP. Found 2 of last year's sheds this year and that's it.
Go to walmart and in the electronics department you will find their USB power banks... I got one called Pocket Juice, got the bigger size with more amperage, so I can not only recharge my phone but also my camcorders while in the woods. I think it holds 2+ charges for a phone and was between 15 and 20 bucks.