Designers Song Teaho and Hyejin Lee showed the world his extraordinary creation. The guys not only invented a very interesting thing, but decided a very serious problem of many users of mobile phones. After all, we are faced with a situation where the battery ends at the most crucial moment, and nowhere to recharge it.

Now the solution is. Need only twist the battery on your own finger. But this requires a special battery with a hole for finger, which built a small rotary generator. Once a person begins to rotate on the finger battery starts to charge the battery.

The authors of this amusing device even have proof of payments, which shows that 130 revolutions around the finger is enough for 2 minutes using the telephone.