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Reasons and solutions for mobile phone batteries not charging:
1. The charger is damaged or the data cable is poor, resulting in non charging.
Solution: Replace with a data cable or charger, and then recharge to see if it can charge. If it can charge, it indicates that there is a problem with the charger or data cable.
2. Battery issues.
Solution: If there is a backup battery, replace it to see if it can be turned on and charged. If it still cannot be turned on, it is likely a problem with the phone. At this time, it should be sent for after-sales testing and repair; If it can be started and charged normally, it is a problem with the battery.
3. The USB port of the phone is often plugged and unplugged for charging, which can easily loosen and break the pin, causing the phone battery to fail to charge,
The solution is to replace the USB port, which requires finding a professional technician.
4. The battery has been used for a long time, and the metal electrode is oxidized, resulting in poor contact and inability to charge.
The solution is very simple, just use an eraser to polish the metal electrode of the battery.
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