Wireless charging is becoming an ever more popular way to juice up consumer gadgets, but an international team of scientists may have figured out how to scrap the mat too.
Research by the Moscow Institute of Physics and Technology offers a way to wirelessly transfer power consistently over longer distances than conventional methods.
At present, wireless charging makes use of electromagnetic fields generated by induction coils that start working as soon as a supported device (such as a phone) comes into range.
An alternative approach is far-field energy transfer, which requires two antennas, one sending electromagnetic waves to the other.
Boffins have often proposed the approach as a way of transferring solar power from orbiting satellites to Earth.
Difficulties with the size of the ground-based receiver and practicalities of the conversion process have led the likes of Elon "say what you mean" Musk to react somewhat negatively to the idea.