The Mi car wireless charger 20W can provide a maximum of 20W output power, while the Mi 11 Pro supports 30W wireless fast charge. Although the rated power of the car charger is 20W, due to a certain amount of energy loss during the charging process, the wireless charging power of the Mi 11 Pro is actually slightly less than 30W. The actual power depends on factors such as the efficiency of the on-board charger and the design of the charging middleware. Overall, the Mi 11 Pro can get an efficient and fast wireless charging experience when charging with the Xiaomi in-car wireless charger 20W.