Yell to charge your phone!

Sitting in a noisy bar, caring for screaming children, or watching the ball game - all awful locations to make a phone call, but soon these scenarios could actually help charge the battery of your cell.

New research by Queen Mary University of London and Nokia shows that the piezoelectric zinc oxide - which creates a voltage as it expands and contracts - can be used to create coatings that could help power devices.

Scientists have developed a nano-rod form of zinc oxide, which can be applied to the surface of other materials. Those nanorods respond to everyday noise, microscopically expanding and contracting and in turn, creating a voltage. That can be captured by electrical contacts on either side of the rods and could be used to charge a phone or some other portable device.

The team has created a prototype device, attempting to save costs and to see whether it is viable as a technology. The prototype is about the same size as a Nokia Lumia 925 and is capable of generating five volts when exposed to loud noise.

While that might not provide the fastest charge in the world, it's still an amazing achievement - and one that could at least help our phones last longer between charges in the future.