This spinning kinetic cellphone battery is a great solution for times when your phone is dangerously low on juice. With a simple twirl of your finger, you can charge your battery with enough energy to provide a couple more minutes of talk time or a number of minutes of standby. Designed by Song Teaho & Hyejin Lee, the cell phone battery is recharged by simply placing it on your finger and twirling. As the diagrams indicate, twirling the battery 130 times will generate enough power to provide you 2 more minutes of talk time or 25 minutes of standby power.
Via Yanko Desig