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