The OnBeat Solar Headphones by Andrew Anderson integrate a flexible solar cell into the head band. A light-weight Lithium Ion battery located in each ear cup slowly store the energy collected from the solar panel, then when you're ready just plug your phone or media player into the USB slot to charge. The headphones will store enough juice to charge a mobile phone to 100%
Included with the headphones are a 1.5m audio cable with integrated remote a 6.3mm stereo plug converter and a protective carry pouch. As an early backer you can get the headphones for £69 if you don't get in on that then the prices jump to £79, and £89. The Onbeat Solar headphones will retail for £119.