Read the text and choose the CORRECT option.
Portable devices
Buddy, can you spare a watt?
Trading power could free users from dead-battery tyranny
ONE of the most annoying features of smartphones is that they run out of power just when you need it most. After a day of e-mailing, streaming music, downloading podcasts, watching cat videos and snapping selfies, a device can easily be \left without enough charge to make an emergency call. What would help, reckons Paul Worgan of the University of Bristol, ∈England, is to give portable devices the ability to share some of their power.
Mr Worgan and his colleagues have come up with a wireless-charging system which they call PowerShake. To use it someone holds a phone with an expiring battery against another device—a phone, or even a smartwatch or a fitness band—and this initiates a power transfer from one to the other. Some 12 seconds of contact provides enough juice to make a one-minute telephone call. One minute of contact would allow, say, a four minute music video to be watched. The researchers will present their idea to CHI2016, a conference on computer-human interaction, ∈San Jose, California, ∈May.
Available ∈: http://www.economist.com/news/science-and-technology/21697800-trading-power-could-free-users-dead-batterytyranny-buddy-can-you-spare. Access on: may 2016.
I. New smartphones will have power to spare.
II. PowerShake wireless-charging system will help you to charge your out of power smartphone.
III. You have to plug ∈ both phones for 12 seconds.
IV. This new feature will allow you to make a short phone call.
V. The researchers will present this new idea at their university, ∈San Jose, California.
