What Happens When Cmos Battery Runs Out. The worse that usually will occur is the BIOS not saving your settings once your main power has been disconnected like pulling the main power cable for a certain period or turning off your system via a Power Center Strip etc as without a CMOS battery to keep the BIOS data alive then it wont keep them saved. Also the datetime keep getting reset even after you fix them in the BIOS.
The worse that usually will occur is the BIOS not saving your settings once your main power has been disconnected like pulling the main power cable for a certain period or turning off your system via a Power Center Strip etc as without a CMOS battery to keep the BIOS data alive then it wont keep them saved. Modern boards store identical settings in non-volatile memory making them more difficult to delete. Sometimes the loss of settings will prevent the computer loading the operating system.
The CMOS is reset and loses all custom settings in case the battery runs out of energy Additionally the system clock resets when the CMOS loses power.
That is a wide range because there are some factors that influence this. You will probably be asked to reset the time and date when you start the computer up. The CMOS battery provides power to the CMOS chip even when a system is off saving your settings but it will revert to the original factory settings if it doesnt receive power. The CMOS is reset and loses all custom settings in case the battery runs out of energy Additionally the system clock resets when the CMOS loses power.
