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5. The internal charging circuit of the phone is malfunctioning and cannot be charged properly. Find a universal charger to charge the battery.

Solution: If it can be charged and used normally, it is a problem with the phone, so use a universal charger to charge or take it to repair the phone.

6. The internal protection board of the battery has malfunctioned and cannot be charged properly. The solution is to replace the internal protection board of the battery or replace the battery.

7. If the battery of the phone is discharged too much, the battery protection board will disconnect the power supply and charge when the battery voltage is below 2.5V, and the battery will activate the protection setting.

Solution: At this point, the battery needs to be activated. Remove the battery and charge it directly towards the positive and negative electrodes of the battery cell to a voltage higher than 2.5V. The battery protection board will resume normal charging.

Lithium Batteries ,Ensure Quality

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