If your INZONE Buds don't charge in the charging case with the USB cable connected, follow the steps below:
- Place the earbuds in the charging case.
- Connect the USB cable to the charging case.
- Charge the earbuds for at least 5 minutes.
- Reset the earbuds while keeping the USB cable connected.
- Try charging the earbuds again.
If the earbuds still don't charge after performing these steps, try using a different USB cable or AC adaptor, then repeat the steps.