Researchers are working on phones that would be powered by how much they are used.
If scientists could have their way, we would soon be powering our cell phones just by talking on them. In a Georgia Institute of Technology study, scientists have been able to create a piezoelectric material from zinc oxide which produces a small amount of electricity from sound waves. They hope to further improve the material so it generates more energy which would be enough to power cell phones and other portable devices.
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