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A wireless charging room has been developed by scientists. It can deliver power through the air to any laptop, tablet or phone without the need for plugs or cables.

The new technology involves generating magnetic fields (磁场) over longer distances without also producing electrical fields that would prove harmful to any people or animals within the room, according to the team from the University of Tokyo.

The system, which has been tested in a single room but is still in its initial stage, can deliver up to 50 watts of power without exceeding (超过) current guidelines for human exposure to magnetic fields, the study authors explained. It could be used to charge any device with a wire coil fitted inside, similar to the system used with wireless charging pads currently in use—but without the pad. As well as removing charging cables from desks, it could allow for more devices to be fully robotized without the need for ports, plugs or cables.

To demonstrate the new system, they installed the unique Wireless charging equipment in a purpose-built aluminum “test room”. They then used it to power lamps, fans and mobile phones that drew current from anywhere in the room, regardless of where furniture or people had been placed.

Researchers didn’t say what the technology might cost because it is still very early in development and “years away” from being made available to the public. “This really ups the power of computing world—you could put a computer anywhere without ever having to worry about charging or plugging in,” said study coauthor Alanson Sample from the University of Michigan.

There are also medical applications, according to Sample, who said heart implants (植入) currently require a wire from the pump to run through the body and into a socket. “This could remove that,” the author said, adding it would act to reduce the risk of infection and improve patients’ quality of life by removing the wire completely.