People nowadays are pre-occupied with chores making them always on the go. With these reasons, mobility is what we need. Included in what we need are the mobile phones, computers, music and movie players and more. However, we were limited by the low battery life of our mobile device. Not anymore today because designer Pierollo has designed the Willy-Willy, a human powered charger for your mobile devices like USB key, mobile phone and the like. With this device available, we don’t need to worry for our mobile devices’ power anymore. In addition, since it is human powered, it is also a perfect tool for saving the environment.