You can actually read the specification here: https://www.wirelesspowerconsortium.com/downloads/download-wireless-power-specification.html https://www.wirelessp

You can actually read the specification here: https://www.wirelesspowerconsortium.com/downloads/download-wireless-power-specification.html https://www.wirelesspowerconsortium.com/downloads/download-w... As of at least 1.2.2 (April 2016) the Qi spec has supported 15 W through an Extended Power Profile A Baseline Power Profile supporting transfer of up to about 5 W and an Extended Power Profile supporting transfer of up to about 15 W of power using an appropriate Secondary Coil (having a typical outer dimension of around 40 mm).