Mobile phone wireless fast charge 30w, you can use 65w charging head input, 30w output, wireless charging board. Mobile phone support fast charge, compatible charger, charger will not be harmful, mobile phone is not harmful.
When your phone supports 33W wireless fast charge, with a 20W charger, the actual charging power is only 20W.
w is A unit of power, A is a unit of current, and the relationship between them is related to voltage. Take 220v1A as an example. 1 x 220=220VA=220W. 5v1A is 5W. You can convert it yourself, and try to choose a charging head that is larger than the electricity load.