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Did you know that earbuds/Headphone could damage your hearing! learn how to protect yourself.
14 Tips How To Fix Bluetooth Headset Not Charging Issue? – [SOLVED]
To fix your headphone not charging check the power source is ON, then check the charging USB cable, the cable might be defected or not connected properly to one of the ends. if you discover the cable...
To fix wireless headphones whose one side only works or even Bluetooth earbuds, simply start by booting your headphones, if it doesn't solve the issue then resetting its Bluetooth and re-pairing it...