In 2018, the wireless flash charging industry is highly competitive, and the result of competition is that the use effect is getting better and better. Apple introduced a 7.5W wireless charger, which is 4 hours and 17 minutes. The millet then launched a 10W wireless charger, which took 2 hours and 26 minutes. Then Huawei introduced a 15W wireless charger, which took 2 hours and 4 minutes. Today, Xiaomi's 20W wireless charger only takes one shift to fill the phone.