Laptop Bios Battery Replacement: A Step-by-step Guide – You don’t need to abandon ship when your laptop starts malfunctioning. Laptops allow you to perform upgrades when a piece of hardware needs to be replaced. You don’t always need to spend cash to buy a new laptop. Simply buy a replacement part and install it…with caution.
If you have had your laptop for several years, your computer may not be working properly because the CMOS battery has died. The CMOS battery is a piece of hardware unique to laptops. When it turns off, your laptop might have trouble starting up.
Laptop Bios Battery Replacement: A Step-by-step Guide
Fortunately, it’s easy to install a new CMOS battery in your laptop. Here we will dive into three topics:
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Wait, my laptop has more than one battery? In short, yes. While the main laptop battery powers all components, from the CPU to the hard drive, and tends to be one of the largest and heaviest parts of your laptop, a CMOS battery powers only the BIOS and therefore It is generally the size of a coin and lasts a long time. Motherboard.
To understand the importance of a CMOS battery, you must first understand what your computer’s BIOS is.
Every computer has BIOS pre-programmed into its hardware. It is different from an operating system. Operating systems can be installed, uninstalled, and updated long after you have purchased the computer. BIOS is something that is built into the computer while it is being manufactured.
BIOS stands for “Basic Input/Output System.” What exactly does it do? Basically, it manages the essential functions of your computer.
Laptop Cmos Battery Replacement
All computers work through a process of inputs and outputs. Say, for example, you are opening a software program:
Everything your computer does can be reduced to an input or output. The BIOS is tasked with managing the input and output sharing of your computer, primarily when you start it up. The BIOS tells your computer how to start the operating system and also operates peripherals (such as the mouse and keyboard).
You press the power key to turn on your laptop, right? Well, how is your laptop supposed to process the power key when it’s off? That’s what the BIOS is for. Performs basic functions for your computer while your computer is still waking up. Pressing the power key is a basic input. Starting your operating system is the basic result.
If you are a PC gamer, you may be interested in learning how to overclock your computer to increase your processing speed while gaming. You can program your computer to overclock by adjusting the BIOS settings. We will teach you how to use BIOS to overclock at the end of this article.
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The BIOS should remain operational even when your computer is not connected to a power source. That’s where the battery comes into play. When your computer goes offline, the BIOS relies on the CMOS battery for power.
You’ll find CMOS batteries in both laptops and desktop computers, but they are most commonly used in a laptop. This is because laptops tend to be unplugged for longer than desktops. Most desktop PCs are disconnected from their power source very infrequently.
The CMOS battery charges every time your laptop is plugged in. The battery only discharges when the laptop is unplugged. Most batteries will last between 2 and 10 years from the date of manufacture. The more you leave your laptop plugged in, the longer the battery will last.
As we mentioned above, the BIOS is largely responsible for starting your computer. Without the battery, your laptop may have difficulty booting or may not boot at all. You may also hear a constant beeping sound from the motherboard, another indication of battery failure.
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If your laptop manages to boot, you may notice that the date and time have been reset. Most likely they have returned to a date in the past. Even when your computer is turned off, BIOS maintains a real-time clock that tracks the date and time. CMOS (which is sometimes called a real-time clock, itself) is responsible for maintaining that procedure. So if the date and time are mysteriously reset, it is a very good sign that the CMOS battery is dead.
Your peripherals may not be responding: you can’t move the cursor or click any icons, or the laptop isn’t reading any of your keyboard input.
Or your peripherals could break down; your cursor is inaccurate and your key inputs cause strange responses from the operating system.
Or, your custom keyboard settings have been reset to default. These are all signs of CMOS failure, since the BIOS is responsible for managing peripherals at startup.
Fix A Cmos Battery Problem On A Laptop
If you installed any drivers on your computer, such as those used for your home printer, a CMOS failure may cause those drivers to disappear (you will have to download and reinstall them again).
Battery failure can also prevent you from connecting to the Internet. BIOS is tasked with maintaining hardware and network drivers.
One thing that should relieve you is that a CMOS failure typically won’t cause you to lose any of your personal files. Nothing in storage is affected. You’ll still have all your photos, videos and documents waiting for you as soon as you replace the battery.
Let’s remove that old annoying CMOS battery and replace it with a new one. It is a relatively simple process. You will only need a few supplies:
Battery Replacement Guide
You can buy a new CMOS battery online for a very reasonable price, usually between $1 and $10. They are also available, along with ESD pads, at many local retailers such as Target, Fry’s Electronics, Best Buy, and office supply stores.
Your laptop components can be damaged due to electrostatic discharge (ESD). To avoid charge buildup, do not work on a carpeted surface. Work on a flat, hard surface. In fact, if possible, it is best to work on a conductive foam pad. These pads will prevent ESD.
You may have static electricity on your hands. Before starting work, rub your hands on a metal surface to remove the charge. Better yet, if you have an anti-static bracelet you’ll probably want to wear it for this DIY project.
Turn off your computer and disconnect it from its power source. Unplug any and all cables from the laptop, including peripherals.
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Turn the laptop over. Use the screwdriver to remove the screws holding the laptop case in place. Remove the casing once you have unscrewed it.
Please note that on some laptops, only one large case needs to be removed. On other laptops, there are several smaller cases that give you access to different components of the computer. If you’re not sure which casing gives you access to what, you may need to unscrew all the casings and explore a little.
Pro tip: Have a couple of small bowls to hold any screws you remove. Remember, you’ll need to find them all when it’s time to put them back so you don’t want them to fall off the table and get lost.
You don’t want the computer to accidentally turn on while you’re working on it. Typically, the battery is long, heavy, and brick-shaped.
What Is A Cmos Battery And How Do You Remove One?
At this point, you should see the motherboard. Be very careful when working near the motherboard. This is the most important hardware in your computer and could seriously damage the laptop if you damage the motherboard.
The CMOS battery is shiny and round. It looks like a button or coin and is usually placed inside a small holding hole. Remove the CMOS battery – it slides out of the socket just like mouse batteries.
Pro tip: Before removing it, be sure to take note of the orientation of the battery so you know which direction to place the new one.
Place the new battery in the same place. Make sure you place the new battery in exactly the same orientation as the old one.
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Reconnect your laptop to its power source and turn it on. The BIOS should be back to its original settings by default, so don’t be alarmed if the date and time are still incorrect or if drivers are missing. You will need to reset the time and reinstall the drivers.
Pro Tip: Your laptop should have no problem booting up now. If so, it may be your BIOS firmware that is faulty and not your CMOS.
Do you have a desktop computer with a CMOS problem? Read the quick guide on how to replace the CMOS battery in a desktop computer. It’s even easier to replace the battery in a desktop computer because desktop computers typically have a more accessible motherboard.
All computers have a programmed “clock speed.” Clock speed refers to how fast a computer’s processor can read incoming electrical pulses of information. More powerful processors have fast clock speeds.
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If you’re a PC gamer or creative professional, you want a lightning-fast processor. PC games and creative applications, such as Adobe Creative Suite, require your CPU to process and render large amounts of information in a short period of time. If your processor is not fast enough to handle all this data, you may experience lags and lags.
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