Orange has developed a t-shirt that also doubles as an iPhone charger. The t-shirt which is called the Orange Sound Charge is in a prototype phase at the moment. Extensive testing will be carried out at this year’s Glastonbury Festival.

The eco charging device uses an existing technology in a revolutionary way; by reversing the use of a product called Piezoelectric film, allowing people to charge their mobile phones whilst enjoying their favourite headline act at Glastonbury. Usually found in modern hi-fi speakers, an A4 panel of the modified film is housed inside a t-shirt which then acts much like an oversized microphone by ‘absorbing’ invisible sound pressure waves. These sound waves are converted via the compression of interlaced quartz crystals into an electrical charge, which is fed into an integral reservoir battery that in turn charges most makes and models of mobile phone. As the ‘device’ is worn, a steady charge is able to be dispensed into the phone via a simple interchangeable lead which fits most handsets.

Orange believe that a sound level of around 80dB (which is roughly the ambient noise level of a busy high street) could produce up to 6 watt hours of power. That should be enough to charge up your iPhone which needs 5 watts. The panel in the t-shirt is removable so unlike most festival attendees, you can wash your t-shirt if you need to! Take a look at the video after the break then let us know what you think in the comments!