Is RTC Battery the Same As CMOS Battery?

Published on: November 7, 2022
Written by Jonas Frank / Fact-checked by Nova Scarlett

Most computer motherboards have a small battery called a Real Time Clock (RTC) or Complementary Metal Oxide Semiconductor (CMOS) battery. This battery provides power to the BIOS chip so that it can remember the date and time when the computer is turned off. The RTC/CMOS battery is not the same as the main laptop battery or power adapter.

is rtc battery the same as cmos battery

Are RTC batteries the same as CMOS batteries? The answer may surprise you. RTC, or Real Time Clock, batteries are designed to keep track of time even when the power is off.

They’re usually lithium coin cells that last for years. CMOS, or Complementary Metal Oxide Semiconductor, batteries are different. They’re used to power the BIOS chip on your computer motherboard and they only last for a few weeks to a few months before they need to be replaced.

So no, RTC and CMOS batteries are not the same thing. But they both serve an important purpose in keeping your computer running smoothly.

What is RTC Battery?

RTC batteries are used to power the real-time clock (RTC) in electronic devices. They are typically lithium coin cells that provide a long-term power source for the RTC. Many devices, such as computers, mobile phones, and digital cameras, have an RTC that keeps track of the current time even when the device is turned off.

Without an RTC battery, these devices would lose track of time and would need to be reset every time they were turned on. RTC batteries are designed to last for several years, but they will eventually need to be replaced. If you notice that your device’s RTC is no longer keeping accurate time, it’s probably time to replace the battery.

Replacing an RTC battery is usually a pretty simple process; just follow the instructions in your device’s manual.

RTC Battery Replacement

It’s time to replace the battery in your RTC! Here’s a quick guide on how to do it:

1. First, you’ll need to purchase a new CR2032 coin cell battery.

2. Next, locate the old battery in your RTC. It will be soldered onto the board, so you’ll need to carefully desolder it.

3. Once the old battery is removed, simply solder the new one in its place.

Make sure that the polarity is correct!

4. That’s it – you’re done! Your RTC should now be good as new with its fresh battery replacement.

RTC Battery is Low Toshiba Laptop Fix

If you have a Toshiba laptop that is displaying the error message “RTC Battery is Low,” there are a few things you can do to fix the problem. First, try plugging the laptop into an AC power source and allowing it to charge for a few minutes. If that doesn’t work, you can try removing and then re-inserting the battery.

If neither of those solutions works, you may need to replace the CMOS battery. This process will require opening up your laptop, so be sure to follow all instructions carefully. With a little patience, you should be able to get your Toshiba laptop up and running again in no time!

RTC Battery Price

The RTC Battery Price is a cost-effective solution for keeping your timekeeping accurate. This battery will provide you with years of dependable power, and it’s easy to install.

Where is the RTC Battery Located?

The RTC battery is located on the motherboard of your computer. This battery is used to keep the time and date accurate on your computer. If your computer loses power, the battery will keep the time and date accurate so that when you turn your computer back on, it will be correct.

RTC Battery Voltage

The RTC Battery Voltage is a device that measures the voltage of a battery. It is used to determine the charge state of batteries and can be used to monitor charging and discharging cycles. The RTC Battery Voltage can also be used to estimate the capacity of a battery.

RTC Battery Laptop

Most laptops these days come with a built-in battery that allows you to use the laptop without being plugged into an outlet. However, there are still some laptops that require an external battery in order to function. These batteries are known as RTC batteries, and they’re used to power the Real Time Clock (RTC) on the laptop.

RTC batteries are typically small, coin-sized lithium ion batteries that last for several years. They’re usually located near the CMOS battery on the motherboard, and they can be replaced if necessary. If your laptop is starting to have issues with its RTC, it’s likely time for a new battery.

If you’re not sure where your RTC battery is located, consult your laptop’s manual or contact the manufacturer for more information.


A CMOS chip is a type of integrated circuit that uses both n-type and p-type semiconductor materials. CMOS chips are used in a variety of electronic devices, including microprocessors, memories, and power management circuits. The main advantage of CMOS chips is that they consume less power than other types of integrated circuits.

This makes them ideal for use in portable electronic devices. CMOS chips also have high speed and good reliability. There are two main types of CMOS chips: static and dynamic.

Static CMOS chips have all the transistors in their active state when the power is turned on. Dynamic CMOS chips have some transistors in their standby mode when the power is turned on, which reduces power consumption further.

cmos chip


Is RTC Battery the Same As CMOS?

No, RTC batteries are not the same as CMOS batteries. RTC batteries are used to power the real-time clock (RTC) chip on a motherboard, which keeps track of time even when the computer is turned off. CMOS batteries, on the other hand, power the complementary metal–oxide–semiconductor (CMOS) chip, which stores information such as BIOS settings.


RTC RAM CMOS is a type of static RAM that uses a battery to maintain its contents when power is off. It is used for real-time clocks and other applications where data needs to be retained when power is off.

What are CMOS Batteries Called?

A CMOS battery is a type of battery that is used to power the CMOS chip in a computer. This chip contains information such as the date, time, and BIOS settings. The CMOS battery is also known as the Real Time Clock (RTC) battery.

What is the RTC Battery?

An RTC battery is a device that provides power to a computer’s real-time clock (RTC). The RTC keeps track of the time and date for the computer. Without an RTC battery, the computer would not be able to keep accurate time.

The RTC battery is usually a CR2032 coin cell battery. This type of battery is also known as a button cell battery. The CR2032 battery has 3 volts of power and can last for up to 10 years.

When choosing a replacement RTC battery, it is important to make sure that it is compatible with your computer. Some computers use a different type of button cell battery, such as a CR2016 or CR2025. These batteries are not interchangeable and will not work on all computers.

If you are having trouble finding the right replacement RTC battery for your computer, you can contact the manufacturer or ask for help at a local electronics store.


No, they are not the same thing. An RTC battery is a coin-sized battery that provides power to your computer’s real-time clock (RTC). This battery keeps time even when the computer is turned off.

A CMOS battery is a button cell battery that provides backup power to your computer’s CMOS chip. This chip stores information about your computer’s hardware configuration and the CMOS battery ensures that this information is not lost when the computer is turned off.

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