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Still worried about your cell phone running out of battery? Here comes a phone which runs without a battery
With the world moving closer and closer to a wire free age and with convenience reaching new heights altogether, here comes another invention that might take us many more leaps ahead - A battery-less cellphone.

The mobile phone without a battery was designed by researchers from the University of Washington. And no, it's not a solar-powered cell phone. Wondering how does this phone work then? Well, it uses ambient radio signals. quoted Shyam Gollakota as saying, "We've built what we believe is the first functioning cellphone that consumes almost zero power."

Hollakota is the co-author of the research and an associate professor in the Paul G Allen School of Computer Science & Engineering at UW.

The modern day cell phones use analog signals to convert sound into digital data and consume an immense amount of power. So the researchers targeted this very point and were successful in eliminating this step. Instead, the newly designed battery-less mobile phone would use tiny vibrations that are caused in its microphone and speaker, when a person is talking. The phone uses an antenna which then broadcasts the signals to a connected base. On the other hand, to receive the sound signals, the cell phone converts these encoded radio signals into sound vibrations which are later picked up by the phone's speaker. This technology is known as the "backscatter" technology.

As of now, the technology could be only used to make phones calls, so it is like the cell phone of old ages. What remains to be seen is whether the same technology can be extrapolated to modern day smartphone devices or not. And if it works, the researchers might rise to the levels of modern day Tesla.

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