Charge your smartphone in 2 hours with this paper-thin solar panel

Portable chargers are a necessity for how often we use our phones these days. Those need to be charged too, though, and vary wildly in how long they last. The solution? Solar power. 

Solar Paper works in essentially the same way as any other portable USB charger. When you need to juice up your phone just plug it into the device and it'll charge it up for you. Unlike those other devices, Solar Paper is fueled by an unlimited and eco-friendly power source—the sun. Read more...