Researchers harness the power of Wi-Fi to charge devices

A team of researchers from the University of Washington (UW) are working on perfecting a method of charging electronic devices using ambient Wi-Fi signals. They technology, PoWiFi (power over Wi-Fi) makes a small change to routers, so they send out a constant signal that can be harnessed and converted into DC power by a "harvester". The idea isn't new, embodied …