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Now, a device to charge your cell phone while you walk

Jul 09, 2014

The new device is said to be more efficient than a traditional generator, at least for its size.

Scientists have developed a new device that can generate electricity from your body movements to power your cell phone. The device built by researchers from the Georgia Institute of Technology consists of four discs layered on top of one another.

The first disc is made of copper, and rotates. The next is a polymer and remains stationary, and the third is a gold layer that is divided into sectors, with alternating sections cut out, to make something that looks like a bicycle wheel.

The last layer is made of acrylic. When the copper disc rotates, positive charges in the copper move past the negative charges in the polymer. This causes an imbalance of charges in the gold layer, with each "spoke" of gold having either more positive or more negative charges.

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