The reason why Huawei super fast charge is slow: the charger is used incorrectly. Originally, the 9 volt 2 amp charger is used into 5 volt 2 amp, and naturally it cannot be fast charged. Because the charger can support the power is 10 watts.
The same is true for data cables and mobile phones. If the long-term use of the data cable or mobile phone causes its internal damage, it will also lead to too low charging power, resulting in too slow charging speed.
There is also a case of internal judgment error, resulting in the charger mistakenly believing that the phone does not support fast charging. For example, using a charger of a different brand from the mobile phone to charge, sometimes even if the mobile phone supports fast charging, it will not be fast charging.
In this case, you should first consider whether the interface is aging. In this case, you need to find someone to replace it. It is a hardware problem to replace it and solve it