{"id":12877,"date":"2023-04-28T10:21:17","date_gmt":"2023-04-28T00:21:17","guid":{"rendered":"https:\/\/batterytools.net\/?p=12877"},"modified":"2023-05-18T23:07:25","modified_gmt":"2023-05-18T13:07:25","slug":"what-is-a-cmos-battery","status":"publish","type":"post","link":"https:\/\/batterytools.net\/what-is-a-cmos-battery\/","title":{"rendered":"What Is a CMOS Battery?"},"content":{"rendered":"
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A CMOS battery is not something that most of us will ever have to deal with. However, if you are among those unfortunate who are experiencing random computer crashes or power outages, this blog post is for you. Continue reading and learn about what is a CMOS battery and what its functions are.<\/p>\n

What is a CMOS battery, and what are its functions?<\/h2>\n

Many have wondered what is CMOS battery. CMOS stands for “complementary metal-oxide-semiconductor”, a small, coin-shaped battery that provides power to the motherboard or BIOS “Basic Input\/Output System in a computer during periods when the computer is turned off. It’s also known as an RTC battery, short for real-time clock.<\/p>\n

CMOS batteries<\/a> are used in both laptops and desktop PCs. However, they are more common in a laptop<\/a>. This is because that laptops are generally unplugged for a longer duration than desktop PCs. The majority of desktop PCs are rarely switched off from the mains supply.<\/p>\n

When your laptop is plugged in, the CMOS battery gets recharged<\/a>. The battery only loses charge when your laptop<\/a> is disconnected. The average life of a battery is 2 to 10 years after it has been manufactured. The longer your laptop is plugged in, the longer its battery will last.<\/p>\n

How do you know if your CMOS battery is failing?<\/h2>\n

You might be experiencing symptoms of CMOS battery failure<\/a> if your laptop has the following:<\/p>\n