Every computer has a small battery on its motherboard used to provide power to the CMOS on the computer. The CMOS (Complementary Metal Oxide Semiconductor) chip on your computer remembers everything like the disk drive, time and date, etc., so you don’t want to have a CMOS battery failure. The CMOS battery always provides power to the CMOS chip – i.e., even when your computer is OFF – to save all the settings. So, it is very important at the time of booting your computer and other tasks.
The CMOS battery is a small battery fitted on the motherboard of your computer. It has a life of around five years. You need to use the computer regularly to extend the life of the CMOS battery. The computer power supply increases the availability of a standby current and hence increases the life of the battery.
If the computer is not plugged in regularly, the life of the battery is normally 3 years. However, the life of the battery gets extended to 5 years when you use it regularly. The battery provides power to CMOS memory and the real-time clock.
It is a 3V battery. If the voltage drops between certain levels, your computer loses the memory. The CMOS settings like date and time get changed. In some instances, the date and time get set to factory default. For example, your computer date will be set to factory settings, something like 12/01/2008.
The computer will also display CMOS battery failure, CMOS read error, or CMOS checksum error, etc. If this happens, you need to switch on your computer and leave it on for a day. If the computer is not showing the errors after rebooting, the CMOS battery is charging. Otherwise, you need to replace the CMOS battery.
Where to Buy the CMOS Battery for Your Laptop or Desktop
You can make a visit to the local computer store to buy a CMOS battery for your computer or laptop or netbook. You can also buy the coin-shaped 3V CMOS battery from online stores. The premium CMOS battery is advised for trouble-free operation of the computer. It will last for more than 5 years. However, you can also buy a cheaper version of the 3V lithium battery for your computer. But, its life is much less when compared to the premium version. Therefore, it is suggested you buy a premium version of the battery for your computer.
Before buying a battery, you are advised to check the rating of your computer CMOS battery and order the same one from an online store. The online stores usually deliver the items within 5 to 7 days. If you can’t wait that long, you can also buy the premium version from the local computer store.
After Verifying CMOS Battery Failure, You Can DIY!
Replacing a CMOS battery in your laptop or computer is easy. If you are new to the computer or laptop, you can also seek the help of a local computer technician to replace the computer battery.
Items required for replacing the computer’s CMOS battery
Steps to replace the CMOS battery
First, switch off the computer or laptop and remove the power cord from the computer. It is also suggested to remove the battery pack from a netbook or laptop.
Now your computer or laptop is ready for regular use! Again, it is suggested to use the computer regularly to extend its battery life.
Have you changed your CMOS battery in your computer? Let us know how it went!