A new approach to magnetic-resonant wireless-power transfer replaces a wire coil at the transmitter with a high-refractive-index dielectric resonator. Mingzhao Song of ITMO University in St Petersburg and colleagues did numerical work and made a prototype based on exciting the quadrupole mode of a 2 cm-diameter microwave ceramic ball. The dielectric avoids ohmic losses, and the use of the quadrupole mode reduces radiation so that 80% efficiency can be obtained – far higher than the original 45% using metal coils. Rotating the receiver by 90° only reduces the efficiency to 70%. Maybe soon we will be able to throw away our charger cables.