this post was submitted on 26 Jul 2024
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Technology

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218
Researchers discover battery-free technology which harvests power from radio and Wi-Fi signals for low-powered devices (www.tomshardware.com)
submitted 3 months ago by schizoidman@lemmy.ml to c/technology@lemmy.world
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cross-posted from: https://lemmy.ml/post/18426215

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[โ€“] johntwinkletits@lemmynsfw.com 59 points 3 months ago (4 children)

Definitely not new. This is how RFID tags work. They harvest energy from the transmitter to power the circuitry in the tag to send back a response.

[โ€“] isaaclyman@lemmy.world 6 points 3 months ago

Tap-to-pay on credit card chips, too.

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