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This tiny Bluetooth chip doesn’t need a battery because it harvests energy from the air

The Internet of Things promises billions of otherwise ordinary devices to the internet, but when each one needs to its own battery, there’s a limit to how small or cheap they can become.

from https://www.theverge.com/209/1/15/1818345/wiliot-bluetooth-chip-paper--battery-free-low-cost
https://cdn.vox-cdn.com/uploads/_image/image/62847956/wiliot.0.gif

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