LOS ANGELES -- Batteries are the bane of mobile devices and sensors. As a power source they're sometimes unreliable. They must be charged and/or replaced periodically, a maintenance issue that may not mesh with the Internet of Things (IoT), the emerging global network of sensors, embedded objects, and other wireless devices, many of which may require an alternative energy source.
The battery, one might argue, is the weak link in the IoT chain. But researchers at the University of Washington say they have a better idea: By culling energy from existing radio, TV, and wireless signals, they've developed a way to connect low-energy devices, such as sensors and wearables, to the Internet without the need for batteries or power cords.
(Source: University of Washington)
In addition to using radio frequency as a power source, the UW engineers have found a way to reuse existing WiFi signals to provide Internet connectivity to battery-free devices, according to the University of Washington news site.
— Jeff Bertolucci is a freelance technology journalist who writes mostly for Kiplinger's Personal Finance, The Saturday Evening Post, and InformationWeek.
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