It may be that the mobile phone charging cable is broken, and the charge is not satisfied due to poor contact.
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It may also be the reason of the mobile phone battery, take it to the after-sales repair center for overhaul.
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Maybe the charger is faulty, change the original charger to see if it can be full.
In this case, you should first consider, is it your charger problem? If the charger is not compatible, there is a problem with the battery you replaced and it cannot be charged properly