Worry no more, because solar technology is once again leading the way in innovation. OnBeat has developed headphones that have a flexible solar band in the frame that charges batteries in the headset using the sunlight shining on your head. Then you can simply plug in your phone and use the batteries to give you juice when you need it most.
Have you ever been jamming out to your favorite tune and been worried your phone or iPod might die at any minute?
The headphones produce .55 watts, which is enough to make sure your phone gets a good charge as long as you enjoy listening to your music outside. TechCrunch