According to the current mobile phone has a variety of interfaces have a variety of charging facilities, there are 5
Let it go
9V10a, 9v20a, 9v30a
Rated power is 10 watts, 20 watts, 30 watts, 45 watts, etc., all kinds of fast charging mobile phones are different, there are flash charging, but
Your 2a is obviously not a fast charge device, can only be considered as an ordinary charging device, 2a current obviously can not meet the fast charge requirements, as a general charge, I personally recommend you to use 45 watts of power for the mobile phone fast charge person
It means that the power supply can output 2A at most, but the specific output current depends on how much current the electrical appliance being charged needs.
The nominal 2A charger does not mean that it must output 2A, for example, the simplest example, the charger plugged in AC power but not connected to the charger, this time the output current is not 2A, but 0A, it can be seen that the output current also depends on the needs of the electrical appliance charged