EMERGENCE OF BATTERY-FREE MOBILE PHONES TO STOP THE BATTLE WITH CHARGING

                                            

 First Battery-Free Cellphone Makes Calls by Harvesting Ambient Power.

Smart phone users rejoice – researchers have created a phone that works without a battery. The team from the University of Washington took inspiration from a Cold War spying device hidden within a US seal of office which used radio waves to power itself.

The UW team has shown their device (built from off-the-shelf components) can use harvested power to place a call from a distance of 9.4 meters away from a customized base station. They also built a version outfitted with photodiodes that collect ambient light to passively power the device, allowing them to place a call from a distance of 15.2 meters

actuate the earphones and switch between uplink and downlink communications, all in real time.

The team also made Skype calls using its battery-free phone, demonstrating that the prototype made of commercial, off-the-shelf components can receive and transmit speech and communicate with a base station.

The prototype created used a button controlled by the user to switch between ‘transmitting’ and ‘listening’ modes, akin to two-way radios. Unlike modern phones which are in both modes concurrently, engaging only one at a time saved the prototype considerable energy usage.

Now we're showing the world that a battery-free device doesn't have to be a sensor, 

but it can be a whole system where in real-time, you can actually do something useful.

Having proved that you can get away with this tiny power, what next? The research team plans to improve the battery-free phone’s operating range and encrypting conversations to make them secure. The team is also working to stream video over such a phone. 

With future sense on the power consumption factor, the above study proves to be quit a challenge..!!

But from the technology perspective I reckon this could be the future of the communication sectors.