40 watts
Huawei freebuds4 supports 40w unlimited fast charge. Fixed-position charging guides the placement of the charging device and achieves accurate calibration. This calibration method has the advantage of simplicity, but it requires a series of materials in the charging device to be attracted by the magnet, so the power loss associated with eddy currents (and thus the temperature increase) will be induced by the magnetic attractors. It is also a one-to-one device charge that can be positioned to charge, which requires a mechanically movable primary coil.