Everything you need to know about laptop Batteries

To store the energy of today's laptops, notebooks, ultrabooks and all kinds of MacBooks, a flat and small battery is used inside the device. This flat battery is made of lithium polymer. These batteries are abbreviated as Li-polymer. Of course, some (relatively old) models of laptops have an internal battery with 18650 lithium ion cells (round cylindrical cells). Internal batteries have different shapes in appearance. The difference between external and internal batteries has been questioned by many users today, which we will learn more about in this article.

 The Battery is one of the main components of a lipstick and By saving Energy , it can keep your computer on for many hours without connecting to electricity. In this type of battery, you can easily remove the battery. This type of battery can be considered one of the most popular laptops, because they are easily replaceable. Exterior laptop batteries are the subject of our article today. If you do not know about internal batteries, you can also click on the red word to get information about such batteries.


External batteries

These batteries can be easily detached from the laptop. These batteries have a shorter life than internal batteries, but they also have advantages that can not be ignored.



Benefits of External Battery

External Batteries can be easily removed from your laptop so that there is no heavy load on your system. As a result, your device weighs less when moving. If your laptop gets hot, you can easily remove the battery from the device to cool the laptop. External batteries make it easy for repairmen to replace their laptops without having to open them. But replacing internal batteries is not that simple.

Another advantage is that if your battery needs to be replaced, sellers will not be able to use copy parts for you in the original name. Another advantage of the battery is that if you are in a place where you do not have access to a power outlet, you can easily find a replacement for your battery.



The performance of external batteries is not comparable to that of internal ones. These are because they are more established and used more in the past. It is now more popular and more usable.


Disadvantages of external batteries

One of their disadvantages is the large volume and size of the lip, which makes the laptop heavy. Also, the external laptop battery has a larger size and weight than the internal ones. External batteries are easily damaged due to not being inside the device. Some of them even absorb moisture and spoil sooner.


External and internal battery differences

Internal batteries are different in appearance from external ones. Internal batteries are different from external batteries in terms of connectors. You need to know that they have screws on them but external batteries do not have screws. Another point we can mention is that we have two models of external batteries. A lithium-ion model, which is mostly tubular, and a lithium-polymer model, which is mostly in the form of a book. To know more about lithium ion or lithium polymer batteries, it is better to refer to our battery article.



External battery maintenance

In order to be able to extend the life of our battery, we need to take more care of it, but with the right care. You do not want to be frustrated if you cannot get the right pitch so invest in a good capo. When your battery reaches 20%, charge it so that the health of the battery does not decrease over time. Do not charge it constantly and give your laptop time to charge, do not constantly charge your device. There is not much difference between internal and external battery care. Do not constantly charge the battery before removing it to 100%.



External battery maintenance In order to be able to extend the life of our battery, we need to take more care of it, but with the right care. You do not want to be frustrated if you cannot get the right pitch so invest in a good capo. When your battery reaches 20%, charge it so that the health of the battery does not decrease over time. Do not charge it constantly and give your laptop time to charge, do not constantly charge your device. There is not much difference between internal and external battery care. Do not constantly charge the battery before removing it to 100%.




Internal Battery

To store the energy of today's laptops, notebooks, ultrabooks and all kinds of MacBooks, a flat and small battery is used inside the device. This flat battery is made of lithium polymer. These batteries are abbreviated as Li-polymer. Of course, some (relatively old) models of laptops have an internal battery with 18650 lithium ion cells (round cylindrical cells). Internal batteries have different shapes in appearance. The difference between external battery li-on and internal Batteries li-polymer has been questioned by many users today, which we will learn more about in this article.

What are the components of an internal battery?

Laptop batteries consist of two parts, the cell and the board. If the battery is a flat type, it is made of several polymer cells, each of which looks like a mobile phone battery or tablet internal battery. But if the battery inside your device is cylindrical, it contains a few 18650 cells. Each cell performs the storage process and the electronic board and connector communicate with the motherboard.

All internal batteries have two structural principles in appearance that can be seen in their connectors and screw locations. When buying a built-in Li -Polymer or Lithium-ion battery, you need to find the product that exactly matches your device and replace it with a worn-out battery. In the image below, you can see an example of a lithium polymer battery. These batteries are usually made flat, which takes up less space.

About the laptop's internal battery and how it differs from the external battery

Built-in or non-removable laptop batteries are usually designed to damage the system less. Moisture and shock will reduce battery life or damage or even cell fire. Physical damage is more likely to occur on an external or external battery. The main difference between an internal and external battery is that: The internal battery can not be separated from the laptop and notebook without opening the body or frame. The external battery is easily detached. That's why it has the title of portable battery.




About the appearance difference between the internal and external batteries of laptops

The two are apparently different from the ones we mentioned above. Internal batteries are different from external models in terms of connectors. As you can see in the picture below. It is necessary to know that the internal batteries are assembled on a form and have screw holes, but the portable model has no screw holes and is installed by grooves and holding clamps.

Another thing we can say about the appearance of batteries; That is, we have two models of internal batteries: an 18650 lithium-ion model, which are mostly tubular, and a lithium-polymer model, which are mostly book-shaped (flat and flat).

About more maintenance and increase the internal battery length of the laptop Li-polymer battery life

For better storage of the battery, do not allow it to drain completely. If your battery reaches 20%, charge it so that it does not drain completely. This causes an electric current to flow through the cells. It is better to have energy management software and check the battery health from time to time; Because if the polymer battery is worn out, it will be bad and may damage other parts of your laptop, such as: touchpad - frame and panel, and especially the charging circuit and its parts. If your device gets very hot, do not use it for a short time to cool it down or use the laptop's cooling pad to increase its battery life. In the video below, you can see an example of the steps to replace the internal battery.

The difference between a 9-cell and a 6-cell battery

Most batteries made for laptops are equipped with a number of 18,650 round cylindrical cells. These batteries are made in 4-cell, 6-cell and 8-cell packs. The most common of these are the 6-cell and 9-cell batteries. You may be wondering: what is the difference between a 9-cell and a 6-cell battery?

Is a 9-cell battery better or a 6-cell one?

There is no definite opinion on this. Because each of these batteries has its own advantages and disadvantages depending on the needs of users, you need to see what you expect from the battery. Do you use your laptop to play games and do heavy processing? Are you a student and need to take your laptop to college regularly? Are you a person who travels constantly? Or is it just your use at work? You may also have questions. So let's answer the questions.

If you are a gamer and you use a gaming laptop, we suggest you use 9-cell batteries. Because the charge retention of these batteries is more than a 6-cell battery.
If you are a student and you use the laptop only for daily studies and homework, and on the other hand, you constantly take the laptop with you to university, use a 6-cell battery. Because it weighs less and makes carrying a laptop easier for you.
If you are a regular traveler and your working conditions are such that you have to travel long distances and have less access to electricity, it is better to use a 9-cell battery. Because the 9-cell battery holds more charge.

Battery weight and size:

The space occupied by a 9-cell battery is more than that of a 6-cell. This means that the 9-cell battery is heavier. If you are a person who always has a laptop with you, we recommend using a 6-cell battery. Therefore, one of the advantages of the 6-cell battery is its light weight and ease of movement, and it takes up less space. On the other hand, one of the most important disadvantages of 9-cell batteries is their larger size and heavier weight than the 6-cell type.

If you move your laptop less, use it if your device supports a 9-cell battery; Because the battery charge retention time is longer.

Price Difference

The more cells in your battery, the higher the price. Therefore, 9-cell batteries are more expensive than 6-cell batteries. If you have a low budget to buy a battery, get a 6-cell battery for your laptop. So in this part we realized that one of the advantages of a 6-cell battery is that it is cheap. Also, the disadvantages of 9-cell batteries are the higher price than 6-cell batteries.


Charge maintenance rate

As the number of cells in the battery increases, so does the energy available. Therefore, one of the most important advantages of a 9-cell battery is higher charge maintenance. And from the disadvantages of 6-cell batteries, it can be said that the charge of these batteries is depleted a little sooner.

Frequently Asked Questions by Customers

Question: Hi, I am using a Dell Inspiron 1525 laptop. My laptop has a 6-cell battery. Can I replace the existing battery with a 9-cell battery?

Answer : Yes, a 9-cell battery can also be used for this model. And I have to remind you that the more cells you have, the more time you charge. The only minor drawback is that it adds a little weight to your laptop.

Question: How do I know if my battery is 6-cell or 9-cell?

Answer : Some laptops support both 9-cell and 6-cell batteries. And it is very difficult to distinguish between the two. 9-cell batteries are larger than 6-cell batteries. To better understand this issue, I recommend watching the video below.

Question: Where can I buy a suitable and original battery?

Answer: You can buy original batteries and adapters for laptops, as well as other parts and accessories for laptops by visiting the PARTAKO online store. Click to buy the original laptop battery.

Components inside the laptop battery

Laptop batteries are divided into two types in terms of internal and external. In this article, we are going to take a trip into the external batteries (External) and examine the components inside the battery. First we will have a general introduction about the structure of the laptop battery and then we will examine its electronic components and components. These components include the electronic board, battery cell and other related components. Can these batteries be repaired? Stay tuned to PARTAKO.



Li-Ion Batteries:

Lithium ion batteries are especially popular today. This popularity is due to the unique combination: very high energy storage and low physical volume. These batteries are used today in mobile phones, tablets, laptops and other similar electronic devices.

Reasons for the popularity of lithium ion batteries:

Reasons for the popularity of lithium ion batteries:
  • Very light weight compared to other rechargeable batteries of the same size is the most prominent feature of lithium ion batteries. The electrodes of these laptop batteries are made of lithium and carbon. Lithium is an element with a very high reactivity, so a lot of energy can be stored in its atomic bonds. A lithium-ion battery can store up to 150 watts per hour of energy per kilogram of battery, which is much more energy storage than older (lead) batteries.
  • The charge retention of these batteries is much higher than similar batteries.
  • Unlike many batteries, it does not need to be fully discharged when recharging.
  • Lithium-ion batteries can control hundreds of charge and discharge cycles.

Disadvantages of such batteries:

In addition to the above advantages, such batteries have disadvantages:
  • The useful life of these batteries starts to decrease after leaving the factory and usually their useful life is about 2 or three years. Whether the battery is used or left unused will reduce the life of the battery over time.
  • These batteries are very sensitive to high temperatures. High temperatures cause the battery cells to be damaged more than usual.
  • To manage these batteries, you must have a notebook or similar device, which is the biggest reason why these batteries are expensive.
What are the components inside a computer battery?


The components inside the laptop battery include the following parts:
  1. Thermometer section
  2. Lithium ion cells
  3. Voltage conversion circuit
  4. Laptop connector
  5. Voltage divider
  6. Battery charge controller

Thermometer section:

Look at the picture above. This section controls the overall temperature of the battery. If, for any reason, the temperature rises, the thermometer will drop in temperature by reducing the electrodes on the battery. There are also sensors in the battery compartment inside the laptop that largely control the incoming heat.

Lithium ion cell:

Each of the green parts in the image above, which looks like regular batteries, is called a cell. The power of each of these cells is equal to six watts per hour of energy. Overheating of one cell can cause other cells to overheat. As a result, it reduces the useful life of the device.

Voltage conversion circuit:

This circuit maintains a safe voltage and current while charging and discharging the device. Although this section is designed to identify hazardous conditions and prevent cell damage by shutting down the battery, component faults here can increase the risk of total circuit failure.

Laptop connector:

If the battery is detached from the main components, this part avoids the risk of connection in the circuit and minimizes side hazards. Even if the plastic cover of the battery is damaged, the circuits inside the battery should detect short circuit conditions and protect against rapid discharge of cells.

Voltage divider (voltage valve):

Most consumer devices consider each cell as a single battery, and this can be catastrophic. Over time, some cells lose their capacity faster than others, and charging and discharging can be done in reverse, which is very dangerous for the battery and the device. The internal circuits of the battery must control the input and output voltage of each cell separately and turn off that cell if there is an imbalance in one of the cells. This operation is performed by part E in the image above, which is called the voltage valve.

Battery charge controller:

This section includes an LED row and a button. To report the exact status of the charge, the electronics inside the battery must record the history of the current inside the cell and a model of its behavior. This report changes over time as more modern cells are recalibrated. This operation is the responsibility of the battery charge controller.


Here are some important points:
  1. If the laptop overheats while charging or using the battery, the computer will cut off power and try to cool down. If you put your laptop in a very hot car and try to use the laptop, this computer may block your power supply until the device cools down and returns to normal.
  2. Despite the small space it takes up, the laptop draws a lot of energy from the batteries. This traction is one of the reasons why lithium-ion batteries lose 5% of their energy per month when idle.
  3. If the battery cells are not completely discharged, the battery pack will shut down. This indicates the breakdown of cells.
  4. Despite the small space it takes up, the laptop draws a lot of energy from the batteries. This traction is one of the reasons why lithium-ion batteries lose 5% of their energy per month when idle.

Lithium ion cells:




In the structure of this battery cell, like most batteries, you have an outer box made of metal. The use of metal is especially important here because the battery is under pressure. This metal case has a kind of pressure sensitive valve hole (ventilation valve). If the battery cell overheats, it will explode. The function of the ventilation valve is to remove excess pressure and heat from the cell. Without this valve, the use of the battery will be very dangerous. This valve is precisely embedded in the cells as a vital safety component. The PTC switch also prevents the device from overheating.

Laptop battery cell construction

The cell of a piece of metal has a long helix consisting of three thin sheets pressed together:
  • A positive electrode called an anode
  • A negative electrode called a cathode
  • A part separating the positive and negative electrodes

Inside the metal chamber of the cell, these sheets are immersed in an organic solvent that acts as an electrolyte. The separator is a very thin plate made of plastic and has very small holes. As the name implies, it separates the positive and negative electrodes while allowing ions to pass through. The positive electrode is made of cobalt lithium oxide (LiCoO2). The negative electrode is made of carbon. As the battery is charged, lithium ions are transferred from the positive electrode to the negative electrode via the electrolyte and attached to the carbon.


During depletion, lithium ions move from carbon to LiCoO2. The negative electrode is made of carbon. As the battery is charged, lithium ions are transferred from the positive electrode to the negative electrode via the electrolyte and attached to the carbon. During depletion, lithium ions move from carbon to LiCoO2.

These lithium ions move at a relatively high voltage, so each cell produces 3.7 volts. This is much higher than the typical 1.5 volt standard AA alkaline cell you buy at the supermarket and helps to make compact lithium-ion batteries in small devices such as cell phones. We have explained how to increase battery life in previous articles.


In general, most laptops use 18650-type lithium-ion cells in the battery pack. Your laptop battery should have a label with the nominal voltage and voltage required for charging, as well as a battery usage guide. Usually such lithium ion cells are charged up to 4.20 volts in DC current, but the normal charge in these cells is 3.75 volts in DC current.

The battery contains a number of cell groups that are connected in series. For example, if we consider the nominal voltage of a battery to be 15 volts and divide it by 3, 4, or 5, and get an answer equivalent to 3.75 or 4.20 volts, this answer indicates that the nominal voltage listed on On the battery is a multiple of the number of cells in the package that are connected in series.

The package generally consists of a positive electrical connection, a negative connection, and a resistor called the NTC, which is responsible for controlling the temperature of the cells. Battery charging operations should not be performed outside the standard range defined for the battery. For example, the standard temperature for these batteries is defined from -10 ° C to +45 ° C, and if the temperature is more or less, NTC will act and provide the desired temperature and, if necessary, Stops charging operations.

About lithium ion battery cell

It is interesting to know that there are 4 to 6 battery cells inside the shell or battery cover of your laptop. Several 18650 cells are connected according to the needs of the laptop and in different methods (circuit building). These different connection modes include series and parallel series. Each of these cells is produced in a healthy state with a capacity of 3.7 volts. Today, most of these cells are lithium ion. These cells take the required current from your laptop's charging circuit and store it in themselves so that you can use the battery's electrical energy storage whenever you need it.



What is an NCR cell ?!

There are different types of laptop battery cells. They are different in terms of the type of structure that is produced in different factories. The NCR battery cell is actually a product of Panasonic Japan. This is a lithium ion cell. The company has been producing quality products for more than 50 years and is known to all people like Sony. Before the advent of laptops, Panasonic was producing the best home appliances. The antiquity and credibility of this technology giant is out of the question and everyone is familiar with it.


Approved by reputable brands of rechargeable devices and international standards, we decided to consider the company's NCR cell to produce and assemble the best laptop batteries.


Why did we choose NCR brand lithium ion cell for you ?!

You may be wondering why an NCR cell and why I should spend a little more to buy such a battery! There are two important issues to consider. When your battery cell is of good quality, it not only keeps you charged longer, but also increases the useful life of your laptop battery. This way you pay less for the battery. As the saying goes, you buy once, but you buy well! These cells have a high milliampere (hour) and because of their good durability against heat, they are a good option for making laptop batteries.
  • NCR cells have more milliamperes that store more charge hours.
  • The NCR cell is suitable for making laptop batteries because it has good resistance to heat.


Why not buy an affordable battery

If you buy a cheap and low quality battery, not only do you have to pay twice for the battery, but also the problems of low quality batteries (such as sudden shutdown of the laptop) will cause other parts such as: your laptop hard drive to be damaged! Because the laptop shuts down unintentionally due to unplanned shutdown of the laptop. If your data is lost, your important files may not be recoverable at any cost. In the event of a sudden shutdown of the system (over time) other materials such as: motherboard failure or other expensive components will be affected.


What is the use of NCR cell for your battery ?!

According to the seller, the battery is expensive and of course the logo and the main logo of the laptop company are not a good option to buy. The appearance of electrical appliances has never been a reason to trust its quality. Why not rely on cheap batteries? Because these batteries are assembled in Chinese factories and the inside of the laptop battery can be filled with any useless cell. There are even many counterfeit Samsung cells. Like the original Samsung phones, which are only original in appearance.

It is good to know that the counterfeit cells empty the charge very quickly and fail in less than a year, but the quality of construction of the Panasonic main cell is excellent, its useful life is long and it lasts against the heat of the laptop. Panasonic cells have original Partaco batteries with higher mAh that charge more time. So you can safely take it out of the house and get to your important work even when your laptop is less than 100% charged.


Quality of other laptop batteries

We tried to order batteries with NCR cells if possible. Of course, the rest of our original batteries have quality cells. Inside, we used Samsung and LG cell phones. As you know, Samsung and LG are the most important factories in the world. We choose quality so that you are comfortable with battery performance.


Why Original PARTAKO Batteries are cheaper

You may be surprised and say to yourself: Why did I use the term IS cheap! These batteries in Partako are really cheaper. When you buy from Partako, you buy some models even 25% cheaper, because you are buying first hand. I'm not saying we are the first, and the Japanese and Korean cell batteries are nowhere but our store, but we are not the last. You buy the battery here first hand, in addition to paying the right price, if one day there is a problem with it and you need to apply for a warranty, your hassle and waiting time will be reduced.


If you do not like it, refer to it!


We value and respect your time and money. If you are not satisfied with the quality of the original battery available in the Partako battery store, we have given you a week to return it. You have 7 days to test the quality and efficiency of this battery in different modes and applications. If you are satisfied with the quality of the product like other Partako customers, do not forget to comment! Finally, rest assured, because these original batteries have a several-month warranty.


Comments