Problem description: The battery level display is normal (upper right corner of the screen). 

The health status is not displayed, and the issue persists after restarting.

Cause analysis:

1. The battery level display is normal, indicating that the connection between the phone and the CK battery is normal.

2. If the health status is not displayed, it indicates that the communication between 

    the CK battery and the original protective board is interrupted.

2.1 Possible cause: The buckle connection between the CK battery and the original BMS is loose.

Solution: Tighten the CK battery and the original BMS again, restart the phone to solve the problem.

2.2 Possible cause: The original BMS is damaged, resulting in communication failure.

Solution: Replace the CK battery with another phone. If it works properly, it indicates that the battery is functioning properly. 

               The previous original BMS is damaged.

2.3 Possible causes: CK battery hardware or software malfunction.

Solution: Replace the CK battery with another phone. If the health status still cannot be displayed, apply for after-sales warranty, 

               send the CK battery back to analyze the cause, and replace it with a good one.