1. A charging power detector is connected in series at the charging port to see if it meets the fast charging parameter standard. If the input power is normal, but the charging speed of the mobile phone is still very slow, it can be judged as a mobile phone problem.
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2, use the original charger to charge other mobile phones that support the fast charge protocol, if the charged mobile phone can not be charged quickly, it is the charger problem.
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3, after the distribution test of 1 and 2 steps, if there are problems, that is, the mobile phone tail plug, charge and discharge modules and chargers have problems, it is recommended to go to the official after-sales.