I remember having seen old generation watches, that powered themselves based on movement of your hand. Today, these old technologies are getting back into demand for good. Take for example this concept from designers Song Teaho and Hyejin Lee. They figured out a way to charge cellphone batteries with a twirl. Twirl battery power It is a simple principle where you twirl things around your fingers and... 

ecoupled-power-12-29-09 Imagine a future with wireless power, no wires required to power your PC, TV or any electrical device. That’s how close a company called Fulton has gotten to in developing wireless power Fulton Innovation has made some a new mid-range inductive power system. It was able to power a 12 watt lamp at a distance of 35 inches, or light up an LED at various points in between. The...