Bios battery on the computer motherboard. The battery for the motherboard is dead - what to do

There are quite a few devices in a computer that affect its performance. While some of the system can do without, most of the parts maintain the overall health of the computer. Most users know about the video card, processor, motherboard and other components. But few people are familiar with the battery for the motherboard. Without it, the system will not cope with the tasks set, failures and errors will be observed.

What's this?

What is a motherboard battery? If you look at the structure of the platform, you can see many small details on it. The location of the battery on it depends on the model, but for almost any board, the batteries look the same. By the way, it in many ways resembles a battery increased several times, which is installed in Wrist Watch.

For what?

What is the battery on the motherboard for? It should be noted right away that this detail is found on every platform of the system. Serves to save the settings of the motherboard. More precisely, it feeds the data archive, which stores the parameters of the board.

The system's CMOS memory is only 256 bytes. From here it becomes clear that it does not require a lot of power consumption. Such a battery can last from 3 to 10 years. It will feed the archive, which stores the BIOS settings and the system timer.

Failure in work

Users rarely encounter a low battery. This error usually occurs on systems that have been running for a very long time. But due to the fact that technology is moving forward, many users try to change components every couple of years, which means that the battery simply does not have time to sit down.

But knowing what a motherboard battery is is still important. You may need to change the motherboard on which this battery is already dead, or you will encounter a factory problem with it.

This small battery is directly dependent on the BIOS manufacturer. Hence the difference in alerts. To understand that something is happening with the battery, you have to look closely at the loading screens.

For example, some systems display a notification when the computer boots up that the battery is low. The screen displays: "CMOS Battery Low Field". If the battery has completely sat down, then the line will appear: "CMOS Battery Field". In this case, you will have to disassemble the system, take out the battery and find a replacement for it. If you have not noticed such inscriptions on the screen, look for this message: "CMOS Checksum Error Defaults Loaded".

Identification

But how do you know if the battery for the motherboard has run out? If you do not look closely at the messages while the computer is booting, you will notice some malfunctions. operating system.

Time and date will often fly off. Of course, this does not affect the performance of the computer in any way. However, many applications can throw errors. This is especially related to utilities that synchronize by date and time. If in this case you do not change the battery, then at first you will have to manually set the settings.

Universal option

The battery can be located in different locations, but in most cases you will come across only one model - the CR2032. A battery for this type of motherboard is found on almost any platform. This is the most optimal model battery both in capacity and voltage. Therefore, it is recommended to buy this particular option.

Problems can only be if your computer is using old platform modifications. The battery for the CR2032 motherboard is relatively new, so older motherboards may not support it. In this case, you will have to open the instructions and look at the compatibility of the motherboard model with the battery.

For some reason, some users do not want to buy a CR2032 battery right away. You can find a replacement for it, but in parallel you can face a number of difficulties. For example, the battery may be slightly smaller than the connector on the platform. In this case, you will have to tighten the contacts. In addition, you can choose a battery with a smaller capacity, which, of course, will discharge faster.

Another variant

If for some reason you boycott the purchase of the CR2032, you can look at other batteries. It will not be difficult to buy a battery for the board. It is enough to go to any online electronics store and indicate your platform model. In this case, a consultant will help you with the question of which battery is needed for the motherboard.

It should be noted right away that the cost of the battery is not very high, and the manufacturer is of little importance, although it is better to give preference to more well-known companies. Before replacing the battery on the board, it is better to read the instructions several times so that all sorts of malfunctions do not occur.

Choosing the type of battery for the motherboard in the store, you will notice or you will be offered three options:

The CR2032 discussed earlier has a volume of 210-230 mAh. Its voltage is 3 volts and dimensions are 20 x 3.2 mm.
CR2025 has 150-165 mAh, voltage 3 volts, and size is 20 x 2.5 mm. This option is slightly smaller than the standard battery.
CR2016 has a volume of 8090 mAh, a voltage of 3 volts, and a size of 20 x 1.6 mm.

In each of these options, the type of battery is lithium, the shape of the battery is a tablet, the diameters are the same for all - 20 mm, but the thickness may vary.

PC replacement

How much does a motherboard battery cost? The price of your purchase will not exceed 50 rubles. The cost depends on the volume.

When will you purchase new battery, you will have to install it on the platform. This process is not that difficult. It will be especially easy for you if you are in general outline understand the design of the system. For replacement, you will need to take a Phillips screwdriver and tweezers. Here is the replacement algorithm:

First you need to disconnect the computer from the network, turn off the power and disconnect all cables from the interface panel.
To get to the motherboard, you need to unscrew one of the side case covers.
Many people recommend wearing an anti-static wrist strap to avoid electric shock. If you do not have one, it is better to grasp the PC case with your free hand.
If any parts prevent you from getting to the battery, you will also have to turn them off. Usually the video card, which can be easily removed from the platform, can interfere.
Now you need to get the battery itself. It is better to carefully examine the place where it is located. Many people recommend taking pictures of the system before disconnecting or changing anything. In this case, you will not lose the location of the battery and will not reverse the polarity of its installation.
To remove the battery, just press the latch on the side. No need to pull, poke or knock on board elements. The latch is easily squeezed out, and the battery itself pops out of the slot. If you find it difficult to reach the battery with your fingers, you can use tweezers in this case.
We take a new battery out of the package and, observing the polarity, install it in the slot.
We assemble the computer and connect it to the network.

Replacement on a laptop

A laptop motherboard battery also exists and of course may need to be replaced. The very technology of installing the battery in this case practically does not change. Difficulties will only be in the disassembly of the laptop.

Manufacturers of some models take care of the user in advance. On the back of the device, they install a special window that can be unscrewed. You can immediately see the battery under the cover.

If you have not noticed such a hatch in your case, you can try to disassemble the laptop yourself. This shouldn't be a problem. In this case, the main thing is to be careful, if possible, photograph all the changes that occur when disconnecting or unscrewing parts. It will be much easier for you to assemble the laptop after replacing the battery.

Details

Usually, no adjustments are required after replacing the battery. But older BIOS versions can throw you into their menu, requiring you to set the date and time, load settings, set custom parameters.

Also, some users ask if it is possible to change the battery when the PC is turned on. In theory, it is allowed to do this, but in practice you can face many problems that will not be so easy to solve. Therefore, it is still recommended to disconnect the system from the network in order to protect both yourself and the motherboard components.

And the last question that a user may have is: "Where to dispose of the used battery?" The question is important, although many are not perceived as such. But the battery has a lot harmful substances and heavy metals that can negatively affect the environment. Therefore, it is recommended to take obsolete batteries to an appropriate recycling center.

Everyone has a motherboard. And this board has an important chip called CMOS that stores system settings, BIOS settings, and other information. And so that all this important information does not disappear even after the computer is turned off, the chip is powered by a special battery installed on the motherboard.

Like any other battery, the motherboard battery will run out sooner or later and must be replaced. In order not to carry the computer to the service for the sake of replacement, you can figure out where the battery is on the motherboard and independently perform all the necessary manipulations. And to buy correct model battery, you need to know its exact characteristics.

Battery labeling for the motherboard

We figured out what the battery on the motherboard is for and that you can replace it yourself. But it turns out that there are several types of batteries installed on the motherboard. This:

CR2025, where 20 mm is the diameter, the thickness is 2.5 mm, and the capacity is 160 mAh;
CR2032, with the same diameter of 20 mm, thickness of 3.2 mm and a capacity of 225 mAh;
СR2035, diameter - the same 20 mm, thickness - 3.5 mm, capacity - 280 mAh.

It is important to purchase a battery with the same marking that was indicated on the one that was on the board when you bought the computer. Another simply won't suit you. So, if there was a battery with the numbers 2032 on the motherboard, then the thinner one will not hold in the connector and will not be able to come into contact with the contacts.

How long does a motherboard battery last?

The battery on the board lasts for a fairly decent period - from 2 to 5 years. In this case, keep in mind that when the computer is constantly turned off, the battery will drain faster than when it is running. And if the battery runs out, then all your individual settings "fly off", and after replacement you will have to restore everything from the beginning.

Symptoms that the battery on the computer's motherboard will soon run out are as follows:

the time on the computer is regularly lost;
is changing appearance unloading windows;
at the beginning of the download, a message or a suggestion to press a key is displayed on the screen to continue the download;
antivirus “swears” at outdated antivirus databases, a paid antivirus program may lose a license key;
some programs refuse to start;
error messages are displayed on the screen, Special attention pay attention to such messages: "CMOS setup error", "CMOS control memory error", "CMOS read error".

Replacing the battery on the motherboard

For self replacement batteries, you do not need special tools or special knowledge. It's pretty simple. Take a Phillips screwdriver and tweezers, turn off the computer and power it off, disconnect all wires from the system unit.

To get to the motherboard, you will have to remove the side cover of the system unit. If the video card interferes with access to the motherboard, you will have to remove it too. Either wear an anti-static wrist strap or grasp the computer case with your other hand at all times.

Gently pull the motherboard out of the connector, look carefully at the location of the battery without removing it, or, better yet, take a photo. This will then help you determine the correct polarity when installing a new battery.

Press the catch on the side of the battery and use tweezers to pick up the battery that has jumped out of the connector. Install a new one in its place, observing the polarity and assemble the computer back.

Do not rush to throw the removed battery into. It contains compounds of heavy metals that are harmful to the environment. Take it to a designated collection point for proper disposal.

Any computer has a motherboard, one of the components of which is an important chip - CMOS. It stores system settings, BIOS settings, clock readings. This information should not disappear even after the computer is disconnected from the network. A special battery is used to provide power to the CMOS installed on the motherboard.

If the motherboard battery runs out and stops performing its function, then it's time to replace it. You can contact a specialized service or do it yourself. If you decide to install a new battery yourself, then you should know its characteristics corresponding to your motherboard. This will help to do right choice when buying a battery.

Battery labeling

Installed on the system board manganese dioxide lithium batteries of the following types:

CR2025 - 2.5 mm thick, 160 mAh capacity;
CR2032 - thickness 3.2 mm, capacity 225 mAh;
CR2035 - 3.5mm thick, 280mAh capacity.

On sale you can find batteries from Duracell, for which they use their own marking, for example DL2033.

The letters indicate the type of battery. The next two digits are the diameter of the battery. For all batteries, this parameter is the same - 20 mm. The last two digits indicate the thickness. The capacity of the battery depends on this parameter. Thickness should be considered when installing on the motherboard. The thin battery may not make contact with the contacts.

Please note when purchasing that working battery voltage must be between 2.75 V - 3.3 V.

How do I replace the battery in my computer?

The following symptoms, which appear regularly, can indicate the need to change the battery on the board:

time is constantly getting lost;
the loading window is different from what you used to see before;
at the very beginning, a message is displayed on the screen about any error or a proposal to press any key to continue the boot process.

You should pay special attention to the appearance of such messages:

"CMOS configuration error";
"CMOS read error";
"Control memory CMOS error".

Replacing the battery on the motherboard is a simple process. You will need a Phillips screwdriver and tweezers. Sequencing:

we turn off the computer and disconnect all cables from the system unit;
to gain access to the motherboard on which the battery is located, you need to remove the side cover;
to continue working, put on an antistatic wrist strap, and if it is not there, just hold on to the computer case with your free hand;
if the video card interferes with the battery, you will have to remove it;
you can now remove the battery from the connector. Take a close look at how the battery is positioned before removing it. If you can't rely on your memory, take a snapshot of the battery section of the board. This will allow you to avoid reversing the polarity when installing a new battery;
to remove it, press the latch located on the side. It is not worth making great efforts, it is enough to squeeze it slightly - the battery will pop out by itself. With tweezers, if necessary, remove the released battery;
we install a new battery, observing the polarity;
we collect the computer.

With some practice, you will be able to carry out the replacement, just as masterfully as shown in the video.

What to do with a used battery?

Many people, without hesitation, throw away used batteries in trash containers. But it is better to hand them over to special collection points. Batteries contain compounds that can be harmful to the environment.

Where to rent in Moscow?

Battery drop-off points can be found at the following addresses:

hypermarket Media Markt - Leningradskoe shosse, st. Pravoberezhnaya, 1b;
online store "BIO-Dolina" - Khomutovsky blind alley, 4, entrance 5, building 1, metro Krasnye Vorota;
Russian representative office of the German company Atmung - Moscow, business center "Berezka 10", Berezovaya alley, 5A.

Disposal of batteries and accumulators

Depleted batteries begin by removing flammable components such as insulation and plastics. This is done using gas installation thermal oxidation. A scrubber is used to neutralize combustion products. The remaining purified metal elements are crushed and melted. Then there is a division of alloys by weight and type.

In principle, each battery is labeled to warn of the danger of throwing it into the trash can. But as a rule, people for some reason do not pay attention to this, but it is really dangerous, in addition to heavy metals there are still many all kinds of toxic substances, it is believed that one discarded battery pollutes 20 square meters of soil and 400 liters of water.

All motherboards have BIOS installed. It retains its settings even after shutting down the computer. He does this at the expense of the battery, which is on the motherboard and powers his chip while the computer is disconnected from the network. But not a single battery lasts forever and sooner or later runs out. The BIOS battery is no exception.

Most often, flat batteries with the CR2032 marking are installed on motherboards. This battery looks like this.

Batteries with indices CR2026 and CR2016 can also be installed. However, it is better not to use these types of batteries, as they have a lower capacity compared to the CR2032. They are also slightly thinner. To install them, you will have to bend one of the hold-down contacts or put something under it so that the battery is kept in the cell.

When to change the battery

You can find out that the battery needs to be replaced by the following signs:

when the PC is turned on, the system does not boot, but immediately opens and reports a discharged battery;
changes in BIOS settings are not saved, and previously made changes are returned to the default values;
the computer shows an incorrect time (including in the BIOS);
The PC spontaneously shuts down or reboots;
the computer does not turn on at all.

On a note! You can find out if the battery is dead in another way: using a voltmeter or multimeter.

If you have this device, then use it to measure the voltage of the battery by applying the contacts of the device to the "plus" and "minus" of the battery. The nominal voltage of the battery is 3 volts. If the result obtained as a result of measurements is significantly less than this figure, it is time to change the battery.

Replacing the battery on the motherboard

Consider step by step guide to replace the battery on a PC and laptop.

Replacing the battery on a conventional computer

On a stationary PC, replacing the battery is easy. For this you need:

Open the lid of the system unit.
Find the battery cell on the motherboard. On the different models motherboards, it is located in different places... It looks like the screenshot below.
In order to remove the battery, it is necessary to push back the metal clip that holds it in the cell with some solid object. A small screwdriver is ideal for this purpose.
Then, in its place, you just need to insert new item nutrition.

Video - Replacing the BIOS battery on the PC motherboard

How to replace a laptop battery

In a laptop or netbook, changing the battery is more difficult. This will require:

Typically, some laptop models do not have a separate battery compartment. It is attached with adhesive tape and connected to the board with two wires. A similar mount looks like this.

On some laptop models, the battery may be located back side board, so you will have to disconnect it too. For example, on this device, after removing the back cover, we do not see the battery. But we see the contacts through which it is connected to the board. This means that it is on the other side.

Advice! If you are not sure of your actions and are afraid that you will damage your laptop, then it is better to take it to a workshop.

Video - Replacing the BIOS battery in a laptop

In the system unit of your computer, on the motherboard, there is a small flat lithium battery that resembles a coin. The service life of this battery is quite long - up to five years. But when the computer clock will start to show the wrong date and time, and the BIOS settings will be reset, this battery will need to be replaced.

The contact pads of the new CR2032 battery have a voltage of 3.3 volts. During the operation of the motherboard, this voltage decreases and its level becomes insufficient for stable operation of the clock and support of the BIOS memory when the computer is turned off.

Then, when the system starts, a message will appear about the need to configure the BIOS parameters, and after loading the clock will show the wrong date and time. The same is true for laptops.

How to properly change the battery in the computer motherboard

Let's replace the battery! We will buy a CR2032 battery in the store, disconnect the power cord of the system unit from the mains, dismantle its left side cover, and system unit we will place it on the right side, which will provide access to the radio elements of the motherboard.

Let's find a discharged battery, it can be located anywhere on the motherboard. Pressing lightly on the battery, squeeze the latch and easily remove it from the slot. Proceeding in reverse order, install a new battery in the holder, paying attention to the polarity (its positive terminal with the inscriptions and the plus sign must be on top)!

Press lightly on the battery housing until the retaining spring clicks. Right installed battery fits securely in the holder. Now you can collect and turn on your computer!

At the beginning of the download, go to the BIOS, make the necessary settings and save them at the exit. The time can be set both in BIOS and after starting the operating system.

And what to do if the battery in the laptop has "run out"? In this case, you should contact the service, because disassembling the laptop case often requires special tool and is performed in a specific sequence. Trying to disassemble a laptop case yourself can easily ruin its appearance!

Never buy batteries "in stock", they have a limited shelf life!