Battery Charge Finger Wear

During the time to charge the phone battery by plugging into a power source. Then there are also tools to charge the phone battery in a way in-crank, which feels quite strange. Apparently there are other strange ways to charge the phone battery, that is by turning the battery. This concept, developed by two designers, and Hyejin Teaho Song Lee. They're trying to make the battery to charge it enough by turning it with your fingers. For 130 rounds of energy can be generated to make the battery last for 2 minutes to Talk Time. Mmm ... although electricity can save energy, but it seems that the concept of this battery will drain energy users. (Gizmodo)