Types of CMOS batteries - The following is a listing of the types of batteries found in computers to power the CMOS memory. The most common type of battery is the Coin cell battery (Lithium Battery). The coin cell battery is the size of a dime, as shown below.
Life time of a CMOS battery - The standard lifetime of a CMOS battery is around 10 Years; however, this amount of time can change depending on the use and environment that the computer resides.
CMOS ABCs
Also known as a RTC/NVRAM or CMOS RAM, CMOS is short for Complementary Metal-Oxide Semiconductor. CMOS is an on-board semiconductor chip powered by a CMOS battery inside IBM compatible computers that stores information such as the system time and system settings for your computer. A CMOS is similar to the Apple Macintosh computer's PRAM.
Reference Issue / Question
CMOS Dictionary definition and related links on the CMOS.
BIOS Information and help with the computer BIOS.
Battery Issues and help relating to the main battery.
CH000015 Each time the computer boots I receive a prompt for the time and date.
CH000037 Static resource conflict.
CH000042 How to change the LPT port within CMOS.
CH000192 How to enter the BIOS or CMOS setup.
CH000235 How to clear an unknown BIOS password.
CH000237 CMOS checksum error.
CH000238 Prompt to enter CMOS when booting computer.
CH000239 How to replace the CMOS battery.
CH000291 NVRAM cleared by jumper.
CH000301 Prompt to press F1/F2 each time computer boots.
CH000385 CMOS memory size mismatch.
CH000386 Time and date getting reset and/or losing time.
CH000391 How to backup the CMOS values.
CH000554 How to set a computers date and time.
CH000707 What is the difference between BIOS and CMOS?
CH000933 What is the memory hole at 15M-16M?
CH000934 What is the Graphic Window WR Combine in CMOS?
CH000935 What is the PCI/VGA Palette Snoop in CMOS?
CH000976 How can I reset CMOS / BIOS settings?
