As a backup chip in case the current BIOS Chip is corrupt. You will need a new bios chip for the following purposes.
2 X CMOS Battery PC Motherboard BIOS HP ACER DELL Optiplex INSPIRON
BATTERY FOR HP ProOne 400 PC MOTHERBOARD BIOS CMOS FREE POST
BIOS CHIP HP ELITEBOOK 865 G9, ELITEBOOK 845 G9, ELITEBOOK 835 G9
BIOS CHIP HP ELITEBOOK 650 G10
BIOS CHIP HP PROBOOK 450 G6, PROBOOK 440 G6, PROBOOK 430 G6, PROBOOK 6570B
