Solarmonkey charger with a tough water- and shock-resistant clam-shell case, attaches to your backpack hitting the trail. Unlike other solar chargers, it includes an internal battery that, when fully charged, can charge a smartphone two to three times. It takes about 8 hours to get a full charge and comes with a variety of adapters for all your gadgets. It retails for $132.
For camping or survival kit always carry a pencil sharpener in your bag or survival kit. It can be used to sharpen sticks for use in arrows or gigs and the shavings make an excelent tinder for fire starting