Battery backup is not the same as Non Volatile memory.
Consider FLASH or EPROM or EEPROM or PROM or other forms of memory that are much less volatile. --.139 (talk) , 14 October 2013 (UTC) CMOS memory can't simply be replaced with flash mem or EEPROM, because the latter are written in a different way.
All in all, except for occasional board-vendor-specific flash-based experiments, the CMOS NVRAM of the PC BIOS still is what it always has been.
Some of the more obscure data managed by the BIOS (hidden, "behind the scenes") may indeed be stored in the flash.
Tools such as Microsoft's System Management Server (SMS) and the latest Windows Management Instrumentation (WMI) which is the Micorosft version of Web Based Enterprise Management (WBEM) use the information in the DMI pool data.The information gathered by SMS includes the processor information, memory information, hard drive information, video card information and other information crucial to making decisions on upgrading hardware and software on a network.In most case the DMI pool data is updated without any problem, but at times the system may hang when updating the pool data.The non-volatile BIOS storage in contemporary computers might be in an EEPROM or flash memory chip and not in CMOS itself." BIOS is stored in a ROM chip on the motherboard. You access CMOS Setup to change the setup configuration information that BIOS reads from CMOS. When you "flash" the BIOS, you are changing the code for the Basic Input/Output System, not the configuration information in CMOS RAM.Wheelzz9 , (UTC) I can see several incorrect statements.