If CMOS battery is discharged .What effect will occur?

If the CMOS battery is discharged, the computer will lose its ability to retain BiOS settings, including system time and date, boot order, and hardware configuration. This can lead to errors during startup, such as incorrect time displays or failure to recognize hardware components. Users may need to reset the BiOS settings manually whenever the computer is powered off. In some cases, the system may fail to boot properly until the battery is replaced.