It can be used. Because the phone has a battery management unit inside, it reports the battery usage and remaining power at any time. Real-time monitoring of charging progress during charging, and automatic adjustment of charging voltage and current.
Therefore, as long as the fast charger interface and protocol are the same as your mobile phone, and the power is greater than the power required by the mobile phone, you can charge your mobile phone. Be careful not to overcharge for a long time.