So far, safely charging devices anywhere in a large area has been a challenge, but researchers have developed a transfer technology that can direct power to individual devices without needing to know their location. The technology has already been tested with commercial robots, and it can also be used to charge phones, laptops, or household appliances. No plugs, no tracking, and no complex computing — just clever use of electromagnetics. Devices can be charged while they are moving, so with a bit more development this technology could even charge electric cars on the road.