(Natural News) A team of computer scientists and electrical engineers at the University of Washington have designed and unveiled the world’s first battery-free mobile phone that makes use of ambient radio waves or light to function. The phone was touted to “harvest” a few microwatts of power from the said sources to send and receive calls. The team even reported placing Skype calls using the battery-free phone, which demonstrated that it can be used to receive and transmit speech and communicate with a base station. The phone was made of commercial, off-the-shelf components.
“We’ve built what we believe is the first functioning cellphone that consumes almost zero power. To achieve the really, really low power consumption that you need to run a phone by harvesting energy from the environment, we had to fundamentally rethink how these devices are designed,” co-author Shyam Gollakota stated in a university release.
“You can’t say hello and wait for a minute for the phone to go to sleep and harvest enough power to keep transmitting. That’s been the biggest challenge — the amount of power you can actually gather from ambient radio or light is on the order of 1 or 10 microwatts. So real-time phone operations have been really hard to achieve without developing an entirely new approach to transmitting and receiving speech,” co-author Bryce Kellogg quoted in an article posted on the Science Daily website.
Regular mobile phones take up too much energy in transmitting data, which involves…Read More