How to fix broken CMOS after pc battery replace

I recently changed my PC's battery (not the CMOS' battery, the PC's main battery). After that, whenever I boot my PC I get the Invalid CMOS checksum error. Therefore, the BIOS settings reset to default on every system boor. I have tried reinstalling the BIOS and resetting the CMOS. I also opened the computer to see if I could change the CMOS battery. When I did, I could not find the CMOS battery anywhere. After some research, I discovered that my particular PC model has no CMOS battery. It powers the CMOS with the PC's battery. It might be important to mention that the clock gets off when ever

Question by Juan Esteban Arboleda Restrepo on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.