Yes, a 120w charge is very fast.
The reason is that most of the mobile phones on the market have reached 65W or even higher power, and 120W fast charging can meet the needs of most users. Higher charging power is not very significant for the improvement of mobile phone charging speed, but also has an impact on battery life. The development of mobile phone fast charging has entered a bottleneck period, and the future direction may consider more the balance between battery capacity and charging efficiency, in order to protect the battery and improve the user charging experience as the goal.
At the same time, it is also necessary to consider the stability and safety of the charger to prevent safety accidents caused by excessive current in the charging process and internal heating of the charger.