Clear

It shows the battery power left in the charging case. 

50%-100% Green 
10%-49% Yellow
10% or less Red 

While charging the case, the indicator flashed slowly. 
0%-19% Red 
20%-69% Yellow 
70%-100% Green 

Please try to use another known working charging cable to charge the charging case for more than 10 hours through your computer. Compared to other electronics, the headphones are low power products. Hence for charging safety, please do not use fast charger.
 

Please put the earbuds into the case and you will see the red light on the earbuds when charging 
Warm tip: Please be careful not to press the earphone too hard in the charging case, so as not to damage the copper pillars in the charging case.

 

1.The charging case has no remaining power. Placing the earbuds back into the charging case can’t turn them off if the case battery is dead.  
2.Please make sure the earbuds are correctly placed in the charging case, and make sure the charging contacts are clean. Please try to clean the places between the charging case and the earbuds with something like a microfiber cloth.

 

The battery of the earbuds needs maintenance and should be charged at least every three months, if not, the earbuds can cause deep self-discharge by not charging for a long time.  
In addition, not using the earbuds for a long time, and earbuds storage location is not dry, moisture will also cause damage to the earbuds.  
If you haven't used your headphones for five months, the battery is probably dead. At this point, we suggest that you first check whether the charging case has power (whether the indicator light is on) and whether the charging contact at the bottom of the earbuds and charging case is dirty.  
If there is dirt, please clean the charging contact at the bottom of the charging case with a dry cloth or towel. As for earbuds not turning on or the battery drain rapidly when earbuds are taken out of the case, Our recommendation is to place the earbuds into the charging case for 2 hours and close the cover repeatedly and try this way for 1-2 days.