Most of the Huawei chargers cannot be charged with iPad, mainly because the data cable port does not correspond to it. Only some Huawei chargers with C-C end data cable output support iPad charging.
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At present, the charging protocols of Huawei chargers are FCP and SCP protocols. I remember that the output interface of some of Huawei's original chargers is USB-C, 5A data cable, and 18W PD fast charge is supported. The data cable interface of most Huawei chargers is USB-A to USB-C, which does not support the PD fast charge protocol.
This is because Huawei's fast charge agreement and Apple's fast charge agreement cannot be used with each other, and Apple's products must be approved by Apple's official fast charge agreement to support the fast charge function, otherwise only the charging speed of 5 volts and 2 amps can be reached. Not only Apple products, including Samsung products, but also need Samsung's manufacturer certification before you can achieve fast charging.
Whether Huawei is 66w fast charge or not, it can not charge the iPad.
iPad is a series of tablet computer products launched by Apple Inc., its models are specifically divided into iPad mini, iPad, iPad Pro. Among them, iPad and iPad mini are the use of Apple's own charging interface lighting interface, while Huawei's 66w fast charge is the use of Type-C interface, the interface of the two are different, so it is certainly not able to charge the iPad
This should be the charging protocol, not supported by the cause.