Hi;
I have a Li-ion battery charger for my android phone, but or course, it needs charging after using it to recharge the phone several times. That's fine for a week-long hike, but I am planning a month long hike on the A.T. in the fall, so I'm looking for a pack that uses AA cells. I thought about solar, but the added weight and length of time it takes to fully recharge a phone makes it a poor choice. Does anyone have any recommendations?

Thanks

Arden