If your band seems not to charge anymore, please follow these steps :
Test your charger with another functional micro-usb device (an Android phone, or a Bluetooth speaker for example)
- If this one recharges another system well then you can proceed to the next step.
- If it does not recharge any other system, your charger is defective, contact the support team.
Try charging your headband with another functional micro-usb charger (charger for an Android phone, or a Bluetooth speaker for example). Be careful, make sure you use a fairly powerful charger (5V and >1A).
If your headband still does not charge, contact the support team.