It can be divided into the following reasons: the charger is reversed or the charger is faulty; Protection board The protection is not restored or the protection board is faulty. Lithium battery pack and electrical appliance external short circuit.
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When dealing with the above adverse phenomena, find out in turn: whether the charger is reversed, whether the lithium battery pack charging positive and negative plugs are reversed; Restart the electrical appliance to remove the protection board protection, measure whether the protection board MOS tube has driving voltage; Check whether the cable connection is loose and disconnected.
When the battery is fully charged, the phone or charger of the lithium battery will automatically stop, and there is no so-called \"trickle\" charging of the nickel charger for 10 hours. That is to say, if your lithium battery is fully charged, put it in the charger white also charge. We cannot guarantee that the characteristics and quality of the protection circuit will not change the foolproof battery charge and discharge, so your battery will be at the edge of danger for a long time.