The following problems may exist:
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1. When charging, the charger, data cable, and mobile phone charging interface are not in contact, which may lead to slow charging, failure to enter fast charging or failure to charge, please plug and unplug the charger several times.
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2. Check whether the connectors and jacks are clean. If dust is found, wipe it with alcohol or clean it with a brush. If alcohol wipe, need to wait for alcohol to dry, and then re-charge to confirm.
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3. The mobile phone is charged while it is in use. Part of the current input by the charger needs to offset the electricity consumed by the mobile phone hardware such as the screen when it is in use, resulting in a decrease in the current to charge the battery and a slower charging speed.
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4. Please check whether the data cable, charger and socket are damaged or abnormal, if damaged, please replace. If the fault persists, back up the data in advance and go to a nearby Huawei customer service center for maintenance.