Bushnell PowerSync Solar Chargers.
this is a must-have you are intend to venture out into the wild for an extended period of time. there are three models to choose from, but regardless which one your choose, it all packs quite a punch and some are pretty backpack-friendly so you strap it to your backpack while you moving around. just make it is the day and you are not always running away from the sun. remember, the sun is your best friend.