Apple fast charge to 80% is not moving because Apple mobile phone uses intelligent battery management technology, when the battery is charged to 80%, the system will automatically stop fast charging, and use slow charging to protect the battery life and extend the battery use time.
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If you want to continue charging fast, you can try the following:
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1. Use the original charger and data cable: Apple fast charge requires the use of the original charger and data cable, if the use of non-original charger and data cable, may lead to slow charging speed or can not be quickly charged.
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2. Turn off low power mode: If the low power mode is turned on, the charging speed will be limited, so turning off the low power mode can improve the charging speed.
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3. Turn off wireless charging: If you use wireless charging, the charging speed will be slower than wired charging, so turning off wireless charging can improve the charging speed.
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It should be noted that although fast charging can quickly fill the battery, frequent fast charging will affect the battery life, so it is recommended to use fast charging when necessary, and usually use ordinary charging.
This situation is definitely not normal, you can go to the repair shop to find a professional to determine the fault of the charger or battery.