What is CMOS Battery: –
It stands for Complimentary Metal Oxide Semiconductor. It is a battery semiconductor chip and it is used to store the computer start-up information. It means it’s stored system date/time and BIOS setting.
• It’s also known as RTC (Real Time Clock), NVRAM (Non-volatile RAM) or CMOS RAM.
• The voltage of CMOS batteries ranges from 3 to 6 volts but most of the motherboards are used 3V of CMOS battery.
• It is made of Lithium.
• Approx. it’s validity 5 years but it is depending to your uses.
• It’s battery no. CR2032.
• It’s provided to power to CMOS RAM chip.
• It changes when the voltage is less than 2.5V.
• Famous company Maxwell, Kts etc.
Q. Can the motherboard work without a CMOS battery?
Ans: – Yes, the CMOS battery is not providing power to the computer. It is the power to the CMOS RAM chip when the computer is power off or unplugged. So, without a CMOS battery a motherboard can work.
Q. When removing the CMOS battery BIOS setting will be reset or not?
Ans: – Yes, you remove or replace the CMOS battery your BIOS setting will be reset.
Q. Can CMOS battery cause blank screen?
Ans: – Yes, with a dead CMOS battery the BIOS loses the setting and it will be a possible cause of a blank screen.
Q. What is the main function of CMOS?
Ans: – CMOS battery gives the backup power to CMOS of a computer to hold the date/time or BIOS setting.
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