Tuesday, November 12, 2013

Wi-Fi battery power

One of the most frustrating things about my current cell phone (I know, I know, first world problems) is the fact that the battery life is...well...less than desirable. If I'm on the go for the whole day, there's a good chance that I'm gonna need to be on my phone, and an even better chance that the battery is going to die before day's end. Is it too much to ask for a battery to last a full day of normal usage?

There may soon be an answer, and we have college students to thank.

Duke Pratt School of Engineering students Alexander Katko and Allen Hawkes have designed a device capable of picking up wi-fi signals and converting them to usable electrical current. Who needs a power cable when power-filled waves are all around you?
The specifics behind the Duke technology are a bit complex, even for me. But the gist of it is that the students designed a high-efficiency device capable of devouring the power hidden in the invisible waves of energy around us. A small five-cell array was able to pull 7 volts of power from microwaves in thin air — enough to power a small USB device. Want more power? No problem: increasing the amount of usable electricity drawn is as simple as adding another cell to the array.

Photo from the Duke Pratt School of Engineering

Read more: Phones Powered by Wi-Fi Could Make Chargers Obsolete | TIME.com http://www.techlicious.com/blog/wifi-powered-phones-could-make-chargers-obsolete/#ixzz2kSmRExid

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