can
< br >
As long as it is the same as the mobile phone charging interface, the 40W charger can be charged with a 22W mobile phone.
< br >
However, the battery of the mobile phone is best charged with a matching charger, otherwise it will affect the service life of the battery.
< br >
The domestic civilian rated voltage is 220V, it is not able to directly charge the mobile phone, the use of the mobile phone charger is to convert the 220V high voltage pulse into a 5V low voltage pulse, and then through a rectifier, voltage regulator circuit, into 5V stable direct current.
< br >
Ordinary charging head can charge Huawei 40W wireless charger, but with 18W and 20W charger can not reach 40W charging effect.