Without Battery We Can Call From This Mobile Phone

A group of researchers from the University of Washington (United States) has created a mobile phone that does not battery to make calls. Why,Because it has the ability to obtain energy from the air itself.

The new prototype is the result of a year of work by this team. Its motive was to get a mobile to be able to call without a battery, an end for which they had to face two major challenges: 

1.Obtain the necessary energy from the environment

2.Reduce the electrical consumption of a call which usually is of about 800 milliwatts.

First, the researchers focused on resolving the issue of communication. For this, the prototype is based on a technique known as backscatter, a physical phenomenon that consists of the reflection of waves, particles or signals in the direction to where they come from.