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CMOS battery of your laptop maintains hard disk, time and date, and other drivers and configuration settings in a CMOS memory. You will see these tiny CMOS batteries connected directly to the laptop’s motherboard.

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Roy Walker

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3y ago
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16y ago

CMOS stand for Computer Memory and Operating System. A CMOS battery is used as an emergency back-up to keep information you have stored in the phone in memory from being lost if the main rechargable battery runs out of charge. This would include things such as your preferences, contacts, missed/received/dialed calls, downloaded ringtones, etceteras.

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12y ago

The cmos battery (usually a 3V 2025 or a 3V 2032 part) keeps the information in BIOS from being lost when the power is off on the computer. If you remove the battery, the BIOS will be reset to default.

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10y ago

CMOS stands for "Complementary Metal-Oxide Semiconductor". CMOS is a computer chip in a computer that holds certain memory. CMOS stores the settings in BIOS, general computer settings as well as the system clock, and alike. CMOS battery helps the CMOS to remember or rather retain the data or information it holds even the computer is off. It maintains the computer setting as accurate as possible.

One good example is the system clock. If you turned off the computer, the system clock will still run, making it accurate the next time you turn on the computer. This is the function of the CMOS battery.

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12y ago

to keep the clock chip running even when power is of

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15y ago

The CMOS battery saves your computer BIOS settings and the hardware clock. Without this, the computer would not be able to remember the system time or BIOS settings while it is shut down.

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9y ago

i can't answer it so please help me

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Q: What is the function of CMOS battery?
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Related questions

What is the function of CMOS Battery Slot?

A slot on the motherboard intended to hold the CMOS battery.


What the main function of CMOS battery?

To keep the clock chip running even when the power is off.


What is simlartiy of cmos battery and cmos chipset?

There are none. One is a battery which is used to provide passive power to the CMOS chipset to keep it from clearing itself.


What component is necessary to save system settings whe you power off the computer?

CMOS battery


How do you delete BIOS password through command with-ought removing CMOS battery?

how can i break bios password without remove cmos battery


When you restart your computer the error message cmos setting wrong and cmos cheksum bad comes up?

Chances are that the CMOS Battery on the motherboard is dead and needs to be replaced. Without this battery, the computer can not remember the CMOS settings when the power is turned off.


How do you dispose of a CMOS battery?

You would dispose of such as you do any other battery.


Compare ttl bi-cmos cmos?

small battery located on the motherboard or computer case.


Where does the CMOS RAM receives its power when the computer is not turned on?

The CMOS is run off of a battery on the motherboard.


The cmos battery is considered an?

a System Clock.


What are the use of battery?

CMOS battery of your laptop maintains hard disk, time and date, and other drivers and configuration settings in a CMOS memory. You will see these tiny CMOS batteries connected directly to the laptop’s motherboard.


How does CMOS work?

CMOS is the little battery in the computer's motherboard which keeps the computers internal clock running.