Cause of failure; Your battery overdischarged. Battery protection activated. The overdischarged battery shows that it is full and cannot be charged.
You must be listening to the new mobile phone before the first few times to emit light, in fact, it is not necessary, put too much light will appear this problem.
Plan One; Take them to the place where they bought the phone, show them plan two; Put the charger on the phone
If it is in the charging process is definitely shown red, you mainly see if your Bluetooth headset can be used normally after charging, can be said that the bright yellow light is normal.