Here is an emergency charger that gives you multiple ways to generate power for your smartphone. The AYTECH Solar Hand Crank mobile phone charger has dual USB ports and a LED flashlight. It is waterproof and ready for outdoor adventures.
The AYTECH USB solar charger can charge two devices simultaneously. The internal power bank has overcharge/overload, short-circuit, and other common safety features. The flashlight last up to 50 hours.[where to get it]