Washington University researchers created an efficient prototype that it does not need to be charged.
A future where having little battery is not a problem. This is what researchers at the University of Washington want to, so they created a prototype of a cell phone that does not need a battery to work.
They created such an efficient device that it only uses 3.5 microwatts, one millionth of a watt, and gets the necessary energy from the environment. It takes advantage of the one transmitted by the radio signals and has a solar cell the size of a grain of rice. With this it manages to send a signal to a receiving station located to 15 meters of distance.
The prototype is very simple. It has touch buttons, a circuit board and other basic components. What is impressive is the receiving station that manages to pick up the weak signal of the telephone.
Using the device, researchers were able to make and receive calls via Skype. Now they want to improve the device by adding an electronic ink screen, making it capable of transmitting video and encrypting calls to make them safer.
Hmm battery Free cell phone, ~that sounds good~