Watch the video of how it works
"SolePower is another contraption that lets you charge your smartphone through a very basic action that everyone does at some point during the day: walk. Similar concepts have been proposed before, but a group is finally taking action and their proposed device is called SolePower. It’s dubbed as a “power-generating shoe” that allows the wearer to charge portable electronics like smartphones, MP3 players, and tablets as they walk.
