Because the charging protocol is different.
At present, the competition of mobile phones in charging is more and more white, Huawei's 66W fast charge and Xiaomi's 67w fast charge are only 1w short, but in essence, it should be the difference in design route.
Huawei is still using a single battery cell, and Xiaomi's 67W super fast charge is faster than Huawei's 66w in the test, and the Mate 40 takes 48 minutes and 44 seconds to fill, while the Xiaomi 11Ultra is 35 minutes and 49 seconds. The possible reason is that the Mi 67w uses a dual-cell design charge pump charging technology.
The fast charging of mobile phone manufacturers is different because the fast charging protocol is different. Although the fast charge and the fast charge of Xiaomi mobile phone can be charged with one wattage, due to the different fast charge agreements of their mobile phone manufacturers, the data cable and charging head of the fast charge can not be used interchangeover, so it is impossible to achieve other mobile phone charging under the same charging power, so Huawei's fast charge and Xiaomi's fast charge are different.
Huawei's fast charging millet is not the same, because of their brand relationship, so it will be different, in general, we must have the original charger of the same brand of mobile phone to charge, so that they can agree on a fast model.
In general, for mobile phone controls, do not charge while playing with the mobile phone, which has an impact on battery life.
First of all, their fast charge protocol is different in that Huawei's fast charge is more conservative and better for the battery