If you experience charging times longer than 52 minutes via cable or 2.5 hours via wireless charging, please check the following.
1. Ensure that the charging source and the USB-C cable are in working condition.
2. Check that the USB-C cable is connected correctly to the charging case.
3. Ensure that the charging pins do not have any dirt on them which can affect the power flow to the case.
4. Make sure that your device is updated with the latest version of the firmware.
5. Reset the device.