1, if the charging cable is plugged in, the charging light is on and the charge is not charged, there is a problem with the audio, and it needs to be sent for maintenance inspection.
2, if the plug on the light is not bright, that is, there may be a problem with the charger, you can replace a charger to try.
3, if the charger is not original, it may be the polarity of the charger is reversed (positive and negative).