Scientists from both the US and Canada have managed to develop a brand new device that generates energy which could be used to power portable devices in the future, and this very accessory must be strapped onto the knee. This modified knee brace comes equipped with a drive train that is capable of converting mechanical energy into electricity, collecting lost energy whenever a person brakes the knee after swinging the leg forward to take a step.

So far initial tests have shown that a single minute of using this device will be able to produce more than enough power to charge up to 10 cell phones simultaneously. Imagine what you can do while jogging in the morning.