Researchers at Simon Fraser University and two American universities have developed a knee-mounted generator that is capable of producing enough energy to power multiple cellphones. While human generated power is nothing new, you just have to take a stroll threw any department or hardware store to see a number of crank driven flashlights or radios. The difference with this knee-mounted device is that the electricity is generated from the energy put into slowing down the knee joint which makes the effort required substantially less. Good luck getting the thing through security at the airport though! CBC story here.
