Soccer ball that can store energy generated by you!

I was searching for some facts on how play/ sports utilize energy to generate electricity and I found this:


Energy Generating Soccer Ball Brings Power to Developing Nations:

Just in time for the World Cup tournament, a group of enterprising women entrepreneurs has unveiled a soccer ball that captures and stores energy generated by play. Called the sOccket (a mashup of “soccer” and “socket”), the ingenious little ball was created by Harvard alums Jessica Lin, Jessica Matthews, Julia Silverman, and Hemali Thakkar with developing nations in mind. Kids in countries where electricity is not readily available can play a game with sOccket after school and then bring it home to power a lamp so that they can do homework. Imagine what an improvement the sOccket could make in nations where dangerous kerosene lamps that can start fires or even kill children by causing respiratory infections are currently the only option for light.