I'm not sure which brand of wireless phone charger you're referring to, but in general, the fast charge function of a wireless charger depends on two factors: the maximum power output of the charger and the fast charge protocol of the phone.
< br >
If the maximum output power of the Wireless charger is high, such as 15W or higher, then it can support some Fast Charging protocols, such as Qi fast charging protocol, Samsung Fast Wireless Charging protocol, etc., so as to achieve fast charging.
< br >
However, even if the wireless charger supports the fast charge protocol, the phone itself needs to support the corresponding fast charge protocol to achieve fast charging. Therefore, if you want to use a wireless charger for fast charging, you need to make sure that your phone supports the appropriate fast charging protocol.
< br >
In short, if you want to buy a wireless charger that supports fast charging, it is recommended to choose a product with a high output power that supports multiple fast charging protocols, and you need to make sure that your phone itself also supports the corresponding fast charging protocol.