Each has its own advantages, depending on how you choose. The advantages and disadvantages of both are as follows:
1.40w fast charging speed is faster, in the event of an emergency to go out of the phone just no electricity, you can charge a few minutes to solve the urgent need, generally ten minutes can be charged about 30%. However, 40w fast charging will damage the battery and subtly reduce the battery life.
Although the charging speed of 2.22.5w is relatively slow, it is still very fast for people who use more than 10w and 18w fast charging, and 22.5w fast charging is mild and does not hurt the battery.
Charging treasure, in the case of not looking at the price, 40 tiles of course better than 22.5 watts fast charge ah!
A 40 watt fast charge is faster to charge, and of course requires your phone to support such a high charge