How Do I Know If My Clevo CMOS Battery Needs Replacing? 2023

How Do I Know If My Clevo CMOS Battery Needs Replacing

As a clevo laptop owner, you must have noticed that your computer is reset whenever you restart it. This is because your CMOS (complementary metal oxide semiconductor) is not workly properly.

The CMOS battery is responsible for storing computer BIOS (Basic Input/Output System) setting such as date and time, even when the computer is powered off. In this article, we will determine if your Clevo CMOS battery needs replacement.

What is CMOS Battery?

Before we go into the depth of failing Clevo CMOS batteries, first discuss what a CMOS battery is. CMOS stands for complementary metal oxide semiconductor.

The CMOS battery powers the BIOS(Basic Input/Output System) computer code in your laptop. BIOS runs operationally even if your computer is not plugged into a power source. 

What is CMOS Battery

The CMOS Battery is typically located on the motherboard, and it is responsible for maintaining the CMO’s chip setting when the computer is turned off. Without a CMOS battery, all of these settings will shut down, and the user will reconfigure the settings every time the computer is restarted.

Bios need to remain working when it is not even plugged into a power source. Here the working of the CMO’s battery comes. When your computer is not plugged into any source, BIOS relies on the CMOS battery for power.

Symptoms of CMOS battery failure? Must check them out!

There are many symptoms including for which your CMOS battery fails. some of the symptoms include the laptop booting up the difficulty, continuous beeping noise from the motherboard, date and time has been reset, hardware drivers are vanished, not shown, peripherals not shown and not responding correctly, and disabling internet connection.

Whenever your CMOS battery fails, your BIOS firmware will turn off and come back to its default settings.

You might hear a beeping noise from your motherboard is also a sign of battery failure. However resetting of date and time is also considered as a sign of battery failure.

Symptoms of CMOS battery failure

If you installed any driver in your computer, a CMOS failure might cause these drivers to be the invisible thing you must know that CMOS battery failure will not affect your important files and programs.

Nothing of your storage will be affected. You can still have ave your images, videos and documents unless you replace your battery.

How to Remove and Replace the CMOS battery?

Removing the Cmos battery is really a simple and easy process. The only need is for you to have some tools, including a screwdriver, compressed air, a new CMOS battery, and an ESD mat.

To prevent electrostatic discharge (ESD) from damaging your laptop components, avoid working on a carpeted surface and instead work on a flat, hard surface. It is recommended to use an ESD mat if one is available, as these pads will help to prevent ESD.

  • Before you start working, make sure to run your hands on the metal surface because it is possible that there will be static electricity present on your hands that interacts and will make a disturbance. However it is much better for this diy project to have an anti static wrist band.
  • It is recommended to shut down your computer and unplug all power sources and unplug any device or cable from it.
  • Turn over the laptop. to open the laptop casing, you need to take out the screws that are holding it in place with the help of a screwdriver. In some laptops, there is only one largest casing, and in some laptops, there are several small parts of the casing. if you are not aware which one is for replacing the CMOS battery. you might need to unscrew all casing and need to explore which casing is for CMOS battery replacement.
  • Do not forget to put all small screws in a bowl because when the time to put them back in the laptop casing, there is a chance you lose them if you carelessly through that screws into a table instead of keeping them safe.
  • Ensure that you remove the battery before replacing it. You do not want that your computer will coincidentally turn on when you are doing so.
  • When removing the CMOS battery, be careful because the motherboard is the most important hardware in your computer. And it is also said that if your motherboard is damaged by any hardware changes, your whole laptop will damage by it.
  • Place your battery in the right place in the same place where you removed the old one.
  • Rescrew the casing you opened, reinstall the battery and put on the exterior casing.
  • The first and last step is to test your laptop. Plug your laptop back into a power source and turn on your system. Do not be shocked if the date and time are not set, or drivers are missing. Your computer BIOS will bydefaultly back to its original setting. You will need to update the drivers and rest the time.


In conclusion, a failing CMOS battery can cause various issues in a Clevo laptop, such as difficulty booting up, beeping noises, resetting date and time, missing hardware drivers, and peripherals not responding correctly.

Replacing the CMOS battery is a simple and easy process that involves removing the old battery and replacing it with a new one. It is essential to handle the motherboard with care to avoid any damage.

After replacing the battery, the laptop BIOS settings will reset to their default values, and the user will need to update the drivers and reset the date and time.

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