Motherboards require a battery to power the system clock and the CMOS memory.
A computer's motherboard has a battery, known as the Complementary Metal-Oxide Semiconductor (CMOS) battery. This battery is responsible for powering the system clock and enabling the system's underlying hardware settings. Like any other battery, the CMOS battery can lose its charge or die. You must replace the battery with the same exact type of battery.
Motherboard
The D865PERL is a desktop system board made by Intel. This board supports Intel Pentium 4 and Celeron processors.
Battery Type
According to Intel, there is only one type of battery compatible with the D865PERL motherboard. A CR2032 Lithium coin cell (also called a button cell) battery is required to power the CMOS for this system board.
Materials
CR2032 batteries are typically made of Lithium Manganese Dioxide.
Battery Life
The typical battery life for a CR2032 is three years when the computer is not plugged into an electrical outlet. The standby current from the power supply prolongs the battery life. With 3.3 standby volts and a temperature of 25 degrees C, the CMOS clock is accurate to plus or minus 13 minutes per year.
Voltage
The voltage for this battery is 3 volts. If the voltage drops below the appropriate level, the BIOS Setup application saved in the CMOS memory may not be accurate. The electrical charge for this battery is 220 milliampere hours (mAh). The discharge current for the CR2032 battery is 0.2 milliampere hours.
Dimensions
The CR2032 battery weighs 3.2 g (0.11 oz.). The CR2032 measures 20 mm (0.79 inch) in diameter and 3.2 mm (0.13 inch) high.
Tags: battery life, battery milliampere, battery milliampere hours, CMOS battery, CMOS memory, CR2032 battery, milliampere hours