The charging time of different Bluetooth headsets varies, and the instructions generally have a clear answer. Please refer to the instructions to charge.
If you can't find the manual, you can roughly refer to the following answer:
Now most Bluetooth charging cable is just a usb charging cable. Connect one end of the Bluetooth headset and one end of the usb port on the computer.
Some Bluetooth earphones charge the same as mobile phone batteries, start charging, the power light is displayed as red, and when it turns blue (green), you can unplug the power.
Some Bluetooth charging power lights start to blink, when the long light does not flash, you can unplug the power.
When the above situation can not be judged, use the approximate time to decide, according to the battery power size, charging time can be about 2 hours or 4 hours.
Good performance Bluetooth headset, fully charged after listening to music can be 12-15 hours, or even up to 20 hours. If you listen to the song for too short a time, it means that the charge is insufficient and needs to be recharged. If the battery is often not charged, there is a problem with the Bluetooth battery, please replace the new battery or consult after-sales service.