This is the most cool thing I've ever seen on iPhone, Orange has developed a t-shirt that can charge your iPhone by absorbing sound and converting it into useable energy. Sounds crazy, and let's have a look the Sound Charge T-Shirts theory:

The Sound Charge uses an existing technology in a revolutionary way; by reversing the use of a product called Piezoelectric film within a specially designed t-shirt, allowing people to charge their mobile phones whilst enjoying their favourite act at Glastonbury.



You can see the t-shirt being demonstrated in the video below...