Screaming Children Could Charge a Phone Battery

By Gary Cutlack on at

Researchers have dreamed up a revolutionary new method of charging the 14.9-inch smartphones of the distant future -- using sound waves to power a nanogenerator and whack a free charge into a battery.

Zinc oxide nanorods were used to capture vibrations in a test organised by the Queen Mary University of London, with the material creating a voltage when squashed in minute ways by the vibrations of sound. The researchers are excited about the possibilities of harvesting this "stray energy" that constantly wobbles about us, although it all reads like it's a good 50 years away from actually becoming a real thing that works outside of the lab. [Queen Mary University of London via Mashable]

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