Battery free mobile devices are here

Everyday things and even smart buildings could be powered and connected to the Web without any batteries by using the energy that’s available in wireless signals.

The University of Washington yesterday announced that its researchers had created prototype devices that repurpose ambient backscatter to compute and communicate. This technique uses existing radio waves from unlicensed spectrum that governments have reserved for public uses such as baby monitors, TV or Wi-Fi connectivity. The RF provides power and a connection.

By David Worthington

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