According to Zhongguancun online query, if the voltage and current of Xiaomi charger match Huawei mobile phone, then charging can be carried out normally without causing harm to the mobile phone. If the voltage or current of Xiaomi charger does not match Huawei mobile phone, it may lead to slow charging speed, incomplete charging or damage to mobile phone battery. The mismatched charger may be damaged because the voltage or current does not meet the requirements of the mobile phone, resulting in overcharge of the mobile phone battery.
Generally speaking, in order to ensure the best battery health, it is recommended to use the original charger to charge the mobile phone.