We’re slowly moving to an era that our smartphones might not need batteries anymore. Researchers from the University of Washington have developed a mobile phone prototype that doesn’t need a battery to operate.
This prototype requires just 3.5 microwatts of juice, and it uses an innovative approach to avoid the need for a battery cell, rather it uses ambient power from radio signals and its onboard solar cell that’s very small to transmit signals back to the base station 50 feet away.
The prototype itself is made up of capacitive touch buttons, a circuit board, and other components.
The researchers used the device to make and receive calls (via Skype) and place calls on hold. According to the scientists they want to improve the prototype by adding an e-ink display with video-streaming capabilities and encryption to make the calls more secure.