Scientist have developed world’s first battery-less cell phone which runs almost zero power and runs by harvesting energy from ambient radio signals or light.
“We have built what we believe is the first functioning cell phone that consumes almost zero power,”said Shyam Gollakota, associate professor at the University of Washington (UW) in the USA.
The research team also made Skype call using its battery-less cell phone. The team designed special type of base station to transmit and receive signals. That technology conceivably could be integrated into standard cellular network infrastructure or Wi-Fi routers now commonly used to make calls.
The battery-free phone doesn’t mean that it doesn’t require any power. Actually it needs some small amount of power to perform some operations. The prototype has a power budget of 3.5 micro watts.
“You could imagine in the future that cell towers or Wi-Fi routers could come with our base station technology embedded in it, and if every house has a Wi-Fi router in it,you could get a battery-free cell phone coverage everywhere,” said Vamsi Talla, a research associate at UW.
The researchers also demonstrated how to harvest this small amount of energy from two different sources. The battery-free phone prototype can operate on power gathered from ambient radio signals transmitted by a base station up to 31 feet away. In prototype device,the user need to presses a button to switch between transmitting and receiving modes,just like walkies-talkie.
The study was published in the journal Proceedings of the Association for Computing Machinery on Interactive,Mobile,Wearable and Ubiquitous Technologies.