Why does the CMOS require a battery?

Related questions

1. What is the function of BIOS and CMOS?
2. Will a dead CMOS battery prevent boot?
3. Can computer turn on without CMOS battery?
4. Who invented CMOS technology?
5. Should I update my BIOS?
6. What kind of software is BIOS?
7. How does a BIOS work?
8. What is CMOS and its working?
9. Is BIOS a hardware or software?
10. How do we program the BIOS of computer?

Tags

1. #stored
2. #which
3. #settings
4. #computer
5. #would
6. #battery
7. #loses
8. #because
9. #powered
10. #power
11. #traditionally
12. #necessary