▷ Motherboard battery worn out, main symptoms

Every PC motherboard has a small battery that is used to supply power to the CMOS. The CMOS chip remembers everything, like the default disk drive, time and date, etc., so it is undesirable for the CMOS battery to fail. The battery always provides power to the CMOS chip, that is, even when the PC is turned off, to maintain all settings. In this article we talk about the main symptoms of a dead battery on the motherboard.

Index of contents

The main signs of failure in the motherboard battery

The CMOS battery is a small battery installed on the motherboard of your PC. It has an approximate life of around ten years. The user should use the PC regularly to extend the life of the CMOS battery, as the power supply increases the availability of a backup current and therefore increases the life of the battery. If the PC is not used on a regular basis, the battery life is normally 3 years.

It is a small 3V battery. If the voltage drops too low, the CMOS chip loses memory, and settings such as date and time are changed. In some cases, the date and time are set to the factory default settings. For example, your PC date will be set in the factory settings, like 12/01/2008.

All settings, such as drive type, FDD, NUMs lock, etc., will be changed in the PC settings. It can cause booting problems since the PC does not remember information about the disk drive. The PC will display a message such as "Startup error, disk drive cannot be detected."

The PC may be too slow, this may be due to wrong date and time. It is time to replace the CMOS battery to correct these problems.

Some drivers may be missing or malfunctioning. Therefore, you may not be able to print to the printer. Even if you install the printer driver correctly, the PC may still display the message "Printer cannot be found."

The mouse may not respond correctly. You may feel that the mouse may have been damaged, but it could be resolved simply by replacing the CMOS battery. Therefore, before ordering a new mouse, you can test it on another PC to check if it is really defective.

You may not be able to connect to the Internet. You should check if the date and time are correct. If the date and time are wrong, try to correct it. Then double check if you can connect to the internet, otherwise you need to replace the CMOS battery.

If you hear a constant beep when working with your PC, it is a sign that you need to replace the CMOS battery.

Where to buy a CMOS battery

You can visit the local store to buy a CMOS battery for your PC. You can also buy the 3V CMOS battery in online stores. Premium CMOS battery is recommended for smooth PC operation. However, you can also buy a cheaper version of the 3 lithium battery, but, its life is much shorter compared to the premium version. Before buying a battery, it is recommended to check the CMOS battery rating of your PC and order it from an online store. Online stores generally deliver items within 5 to 7 days. If you can't wait that long, you can also buy the premium version at the local store.

Steps to replace CMOS battery

• First, turn off the PC and remove the power cable. It is also suggested to remove the battery from a laptop. Remove the chassis side cover to access the inside of your PC. You can find a button cell battery on the motherboard. Use the flat-head screwdriver to slowly lift the button cell off the motherboard. Use the multimeter to check the battery voltage. If the voltage is less than 3V, it will not remember the CMOS setting, so it is time to replace the old battery with the new CMOS battery. After replacing the battery in the same orientation, replace the side cover on your chassis and plug everything back in. After replacing the CMOS battery, you must enter the correct BIOS settings. Therefore, after starting the PC, you must enter the correct date and time.

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