Why do we need to have a CMOS battery on a motherboard?

The CMOS battery powers the BIOS firmware in your laptop [2]. BIOS needs to remain operational even when your computer isn’t plugged into a power source. That’s where the battery comes in. When your computer gets unplugged, BIOS relies on the CMOS battery for power.

Does CMOS battery store data?

8 Answers. The CMOS battery does not store data. The CMOS battery ensures that the CMOS chip, which does store data, has power. CMOS memory requires power to retain data, so the battery is necessary when no external power is supplied to the computer.

Can I turn on my PC without CMOS battery?

Without the CMOS battery, you would need to reset the clock every time you turned on the computer. On older systems the CMOS battery also provided the small amount of charge required to maintain the non-volatile BIOS memory, which remembered BIOS settings between reboots.

Where is CMOS battery on motherboard?

Find the CMOS battery, which is located on the right side of the motherboard. It will look like a quarter. Take note of the orientation of the battery facing up (+ or -). On Creation Stations, the direction of the battery has the + (positive) side facing up.

Where is CMOS stored?

The CMOS configuration information is stored in a type of RAM called CMOS RAM. CMOS RAM is a special, volatile RAM chip that stores the CMOS information.

What is CMOS on motherboard?

Complementary metal-oxide-semiconductor (CMOS) is a small amount of memory on a computer motherboard that stores the Basic Input/Output System (BIOS) settings. The BIOS is also used to identify and configure hardware in the computer.

What is the function of CMOS battery in a computer?

The Answer. The CMOS battery is not there to provide power to the computer when it is in operation, it is there to maintain a small amount of power to the CMOS when the computer is powered off and unplugged. The primary function of this is to keep the clock running even when the computer is turned off.

Why is there a battery in the motherboard of a computer?

Well this battery in the motherboard, is what powers the CMOS RAM when the computer is turned off. So that it doesn’t lose all your BIOS information. If you didn’t have this battery, then each time you turn on your computer, the BIOS settings would reset and you would need to setup your BIOS again.

When should I replace the CMOS battery in my Motherboard?

If you notice that the time is really wrong during POST, when you pull up your motherboard’s BIOS, or within your operating system, odds are good that you need to replace the CMOS battery.

How do I reset the CMOS battery of my computer?

Resetting CMOS Battery 1 Turn off your computer. 2 Press the power button multiple times to clear any capacitors. 3 Disconnect your computer from the wall outlet. 4 Find the CMOS battery on your motherboard. 5 Gently remove the CMOS battery. If it is secured by a metal clip,… 6 Wait a few minutes, then replace the CMOS… See More….