Scientists at MIT have invented a remarkable device which can turn ambient Wi-Fi signals into electricity. The breakthrough paves the way for energy-harvesting covers ranging from tablecloths to giant wrappers for buildings that extract energy from the environment to power sensors and other electronics. The mind-bending device could soon revolutionize the way we charge our phones, laptops and other gadgets.
Scientists created a device that uses Wi-Fi signals in the air to harness energy
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