A 30w fast charge phone can be charged with 120w fast charge.
Xiaomi 120w Fast Charge MDY-13-ET Parameters:
Input: 100-240V~50\/60HZ 1.7A; Output: 5V3A, 9V3A, 11V6A, 20V6A.
MDY-13-ET built-in protocol chip for the British core IP2729, is a custom protocol chip, internal integration of USB PD, QC3.0 and millet 120W private second charge protocol, also supports thermistor detection of temperature rise.
Using the charger to charge a 30w fast charging phone, they will look for a charging protocol supported by both sides to shake hands and establish a connection, if both support the same fast charging protocol of 30 watts, they will charge the phone with 30 watts of power, otherwise they will charge the phone with a mutually supported charging protocol of close to 30 watts.
30w wireless fast charge with 120w charging head, is definitely not possible, 120w charging head power is too large, will make the battery in the charging process, voltage and current overload, resulting in increased heat, prone to short circuit, and even security risks.
The 30w fast charging mobile phone can be charged with a 120w fast charging charger, which can also make the charging speed of the 30w fast charging mobile phone faster
can not
This is too harmful to the phone, and the charging can not be triggered, and the charging is very, very slow and unsafe.