That’s because researchers at the University of Washington have just constructed the world’s first battery-free phone.
The phone is powered by a few microwatts of ambient radio signals and light that are harvested from the surrounding area.
By eliminating the need for phones to convert analog sound into digital data, researchers were able to create a device that required little to no energy to perform basic functions. Additionally, the phone is only constructed out of cheap, off-the-shelf parts, and a circuitboard.
The team was also able to make Skype calls on the phone, proving that it could be used to contact a base station.
“We’ve built what we believe is the first functioning cellphone that consumes almost zero power,” said the study’s co-author Shyam Gollakota. “To achieve the really, really low…
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