for the following reasons
1, the charging box is no power, when the charging box is no power, it is not possible to charge the headset, found that the headset can not be charged, it is recommended to check whether the charging box has power.
2, the earphone charging connector is blocked, causing the earphone to be charged and there is another situation that is poor contact. Because we use it for a long time, the earphone may get into dust or stains. When the joint is blocked, it can not be charged normally. It is recommended to wipe it with a cotton swab dipped in alcohol, and then poke it with a toothpick to remove the dust and try again.