Main characteristics of the 18650 battery type - capacity, voltage and others

18650 battery

Many users sometimes confuse this battery with a regular 1.5 volt battery. But this is wrong, his tension is much greater. Yes, and the dimensions are different.

18650 battery what is it?

This is a rechargeable battery with the ability to recharge. Some types have a built-in port and the ability to receive charge from a USB connector. This solution is very convenient.

Thus, from the above definition it becomes clear what kind of tr18650 batteries are.

Peculiarities

When considering how to charge an 18650 battery for a flashlight, electronic cigarette and other devices, it is necessary to describe the principle of its operation. The presented standard size is available in the lithium-ion battery category. It has small dimensions. The height is only 65 mm and the diameter is 18 mm.

Inside the device there are metal electrodes between which lithium ions circulate. This allows the generation of electric current to power equipment. When the charge is low or high, more ions are formed on one of the electrodes. They grow on the material, changing its volume and characteristics.

In order for the battery to work long and fully, it is necessary to prevent the appearance of a deep or too high charge. Otherwise, the device will quickly fail. Depending on the battery ratings, special types of chargers are used.

18650 battery specifications

Below we present to your attention the main parameters of this battery.

Voltage

After analyzing a number of online stores, a conclusion was made. Most 18650 batteries are 3.6 volts. But there are options with 3.7 V. At the moment of full charging, the voltage increases to 4.2-4.3 V.

How many amps are in a 18650 battery?

The current strength depends on the specific battery model. The number of amperes in a 18650 battery, according to some sources, is from 0.5 A and above.

Battery capacity 18650

The maximum capacity of 18650 batteries reaches 3600 mAh. The minimum is 1500 mAh. Most often, batteries with increased capacity are used for quadcopters and other energy-consuming devices.

How to determine the capacity of a 18650 battery?

This parameter is determined using a special multimeter tester. You can also see it on the label.

The internal resistance of the 18650 Samsung 25R battery, at room temperature conditions, is 0.022-0.025 ohms.

18650 lithium battery dimensions

The dimensions of this power source depend on the manufacturer and the availability of protection. If there are no protective elements, the size will be smaller.

Battery sizes from Robitin 3600 mAh:

• Length: 64.93 mm
• Diameter 18.20 mm

Thus, the 18650 size is significantly larger than a regular AA battery.

Color

The markets can have both the most common colors and exclusive ones. For example, you can find brown 18650 chocolate batteries.

Main advantages

1. Easy to maintain.
2. Low specific gravity.
3. Low self-discharge level.
4. High energy density.
5. The 18650 battery has no memory effect.
6. Service life is from 7-10 years.

How to charge and with what current

Lithium-ion cells can be charged at various stations. The main thing is that the voltage value is 5 V, and the current is from 0.5 to 1 of the nominal battery capacity. The lithium cell, which has a capacity of 2600 mAh, is charged with a current of 1.3 to 2.6 amperes.

The entire charging period can be divided into several stages. First, the unit, using a current of 0.2 of the capacity, charges for an hour. In this case, the voltage value varies between 4.1-4.2 volts. Then the tension increases.

In order not to bother yourself, you should just buy a charger for AA batteries.

Battery type 18650

There are three main options:

• Lithium iron phosphate, also called ferrophosphate, also LFP, LiFePO4, IFR. (Lithium Iron Phosphate).
• Lithium Manganese Oxide. They are also IMR, LiMn2O4, NMC, LiNiMnCoO2, LiMnO2, INR. High current.
• Lithium Cobalt Oxide. These include LiCoO2, NCR, ICR. They have high capacity.

First

Considered the safest. Their operation is quite stable and with high efficiency. They have an iron phosphate cathode. This means that it has zero toxicity. The battery is tolerant to high temperatures.

The 18650 battery does not have a charge controller. If the case is severely deformed, these batteries may explode or ignite. This happens in very rare cases. 18650 is weakly sensitive to incorrect operation. For example, reducing resistance.

Second

Quite in demand by consumers. They manifest themselves as stably operating batteries. Many manufacturers write that option No. 2 18650 is safe. But in reality this is not entirely true. They don't have a charge controller.

The main advantage of such batteries is that they work with low resistance for a long time. Compared to the cobalt type, manganese ones last longer. Their capacity and current are balanced. The maximum charging current is 4.2 volts. Do not neglect the current strength, this may deteriorate the battery and cause an explosion. The current level affects the charging time.

Can withstand a discharge of 2.5 volts. The anode is made of graphite. With low resistance and high current, gas may escape. These batteries are of sufficient quality and are recommended for widespread use.

Third

It has the largest capacity, unlike those listed above. Their system can be unpredictable. Such 18650 batteries cannot be charged with fast charging. It is prohibited to use in devices that place a large load on the battery.

If you know that certain equipment quickly drains the li 18650 battery, do not put them there. Otherwise, ignition of the electrolyte cannot be avoided. The main device in which they are used at the moment is electronic cigarettes. Charging voltage 4.2 V. If you increase the voltage, overcharging may occur, and this is undesirable. Do not use powerful charges - this may deteriorate the chemical composition of the battery.

Thus, it was only described what types of 18650 batteries there are.

Decoding battery labels

There are no standards in labeling, there are no good 18650 batteries. Each manufacturer puts its own marks. But there is still some decoding.

1) The very first sign means by what technology this battery was developed (I - lithium-ion technology).

2) The next sign is the chemical composition of what the battery is made of (F/C/M/ - iron phosphate chemistry, cobalt, manganese).

3) R - means rechargeable 18650 battery.

The number 18650 means the following form factor:

• The first 2 digits are diameter.
• The next pair tells how long this element is.
• The latest one notifies that the battery is cylindrical in shape.

Letters/numbers are a special marking of energy density (capacity). Each manufacturer writes it differently.

Options:

• Samsung INR18650-20R (lithium-ion battery with manganese chemistry, high current, 2000mah).
• Samsung ICR18650-26F (lithium-ion battery with cobalt chemistry, 2600mah).
• Panasonic NCR18650PF (NCR is a type of cobalt chemistry, this is the middle ground between the first and second options, or LiNiCoO2 chemistry, without the use of manganese. It does not fit existing types, it turned out to be a kind of mixture. The positive side is increased energy density with low thresholds up to 2.5-2 .75V). LiNiMnCoO2 chemistry is used. That is, this high-current IMR is made on the basis of manganese, but the creator left the same mark.
• Sanyo UR18650FM – Sony usually stamps brands in its own way. This is a lithium ion battery with a capacity of 2600 mAh.

Types and types of Li Ion 18650 batteries

All 18650 batteries can be divided into types based on cathode material. The main operational characteristics of batteries depend on this component: capacity and possible discharge current.

The most common are lithium-cobalt batteries. They differ from other batteries in their large capacity. Therefore, they can be used longer.

There is also a group of lithium-manganese batteries. Compared to lithium-cobalt batteries, they have a lower capacity, but at the same time have a higher discharge current.

The last group is lithium ferrophosphate batteries. Although they do not have a large capacity or high voltage, they can be operated for more than 1000 cycles. In addition, until fully charged, you need to keep the batteries in the station for 1 hour.

Which 18650 battery is better and how to choose it?

Based on safety considerations, the best 18650 batteries are lithium iron phosphate. They are low toxic and less likely to explode. When a battery is needed for a flashlight, any kind will do. But remember, if the charger is not reliable, it is better not to charge a battery that does not have protection.

When choosing an 18650 battery, decide for what purpose it is needed. If you are going to use it in gadgets, for example, in a laptop, bicycle, storage battery, then it is better to give preference to the unprotected option. Such types are produced by Panasonic, Samsung, LG, Sony. They usually have flat side edges.

Protected batteries have a special micro board installed inside the case. This tool prevents the battery from overcharging. In addition, it protects against short circuits. This type of flashlight should be used if there is a series connection of two such batteries.

High-capacity 18650 batteries Panasonic 3600 (NCR18650G) and Sanyo 3500 mAh are good for laptops. The cheapest and most popular are Panasonic 3100 mAh.

When choosing, be guided by the types of batteries indicated in the section above!

What else is worth paying attention to?

• Rated current.
• What kind of heating can there be, how does it heat up?
• Voltage.
• Energy capacity.

How does the 18650's convex plus differ from the flat one?

Major original equipment manufacturers (Samsung, LG, Sony, Panasonic, Sanyo and others) do not have a convex plus battery in 18650 batteries - they are all flat. This is because they create industrial items that were never intended for consumer use at home.

The convex plus 18650 indicates that the battery is designed for household tasks, and the flat one - for industrial purposes.

An industrial application could be anything - even a single battery in a portable radio or a toothbrush, or a series of several thousand cells in electric cars. Recently, more and more devices have appeared on the market that require a 18650 battery with a “household” convex plus. A striking example is the currently extremely popular Chinese-made video intercoms.

The convex plus 18650 on some Chinese copies is mounted on a self-adhesive backing - stay away from this!

Yes, in almost all cases the convex plus 18650 is a modification (non-standard design). Often it is simply spot welded to the battery. As you know, they cannot be soldered, but welding provides a durable, strong and electrically sound connection.

18650 battery device

Inside and outside, this battery has the following structure:

1. Fuse.
2. Gasket.
3. Positive conclusion.
4. Current anode puller.
5. Pressure relief valve.
6. The insulation is usually made of cellophane.
7. Positive electrode.
8. Separator.
9. Isolation.
10. Negative conclusion.
11. Frame.
12. Negative electrode.

Typically, an 18650 battery consists of an anode made of copper and a cathode made of aluminum. The built-in electrodes are separated from each other by a special separator. This unit has a porous structure. It is impregnated with electrolyte. The electrodes are carefully packaged in a dense cylindrical housing. Positively charged lithium ions located in the separator penetrate into the graphite crystal lattice. This element is connected to the negative pole of the battery. An electric current potential is formed at the positive.

general characteristics

Today, many sizes and types of batteries are used. One of the most popular is the 18650 battery. It has a cylindrical shape. Externally, such a battery resembles AA batteries. Only the presented type is slightly larger in size than the usual devices.

During operation, the question always arises about how to charge an 18650 battery. This is a simple procedure. However, you need to treat it with full responsibility. The longevity of the battery depends on proper charging.

Batteries of this type are used today to power laptops, as well as electronic cigarettes. This made the presented standard size popular. Similar batteries are also installed in flashlights and laser pointers. Most often, the devices presented are of the lithium-ion type. This type of battery has proven its efficiency and ease of use.

How to charge a 18650 battery?

The 18650 Li-ion battery should be recharged frequently. Otherwise, he may lose his former agility.

1. Charging occurs at a voltage of 0.05 V, and should be completed when the voltage reaches a level of 4.2 volts. This way the battery will be intact.
2. Charging can be carried out at a current of 0.5-1 Ampere. Therefore, it is now clear what current to charge a li ion battery 18650 with. The first value is the most balanced. The second will make the charging process faster. But you should not increase the current unless necessary.
3. 18650 batteries should be recharged in no more than 3 hours. Otherwise the chemistry may suffer. It's good if there is built-in protection. In this case, the battery will turn itself off.
4. You don't want the battery to drain too much. It will be difficult to return to the previous characteristics. It needs to be recharged from time to time.
5. For the first time, 5 charge cycles and 5 discharge cycles should be performed.

How to charge a 18650 battery without a charger?

Without a charger, you can fill the battery with energy only through the USB port. To do this, your battery must have a special connector. Details in the video.

Charger for 18650 batteries

You can charge this battery yourself using a standard charger. Typically, a device with 1 socket is capable of charging with a current of 1 Ampere. Such a device will be convenient for those people who charge once every 12 months.

Connect the 18650 battery charging module strictly, observing the polarity.

Those chargers that have 2 slots for batteries with 4.2 V. If you increase the voltage the battery will die. Fortunately, there is an indicator that monitors the process.

In retail trade you may find mixed types of chargers. They are designed for both 18650 batteries and regular NiCd batteries.

Devices that have a high cost are more richly equipped. They have relays and all possible control indicators. Therefore, charging for 18650 lithium-ion batteries will be more reliable.

What to do if 18650 does not charge?

1. Check the production date, it may have already expired.
2. Think about how many charge and discharge cycles you have already done. If it is more than indicated in the battery characteristics, then it has already served its purpose.
3. Check if the charger is working properly. The wire may have been crushed.
4. Pay attention to the contacts. There is a possibility that the contact between the battery and the tin plate may be damaged. The cause may be plaque, rust or oxidation.
5. Check if there is electricity in the house.

These five points will help you understand why the 18650 battery does not charge.

How to charge a 18650 battery using a phone charger?

The video below provides instructions on how to do this correctly. Here's what you'll need:

1. Mobile charger TR 4056.
2. Battery
3. Soldering iron.
4. Wires.
5. USB cable with suitable connector.
6. Phone charger.

After assembly, all that remains is to connect it to the phone's charger using a USB cable.

But charging 18650 from a solar battery is possible if you create a special device that delivers the required current. But in reality, you will have to try to bring the design to life. There is no finished development yet.

Watch the video on how to build a cool battery with solar panels.

Advice! It is best to buy a charger for 18650 li ion CV or CC batteries.

How to make a charger for 18650 batteries?

Charging for li ion batteries can be done on the LM 317 chip. Below is a diagram and what it looks like assembled.

The video provides an example of creating a charger for this battery.

How to check battery capacity

There are several effective ways to find out the capacity of any battery. Some of them do not require special expenses or special equipment, but only simple mathematical calculations.

The accuracy of such methods is not as high as when using special devices, but they allow you to find out the approximate capacity. For many this will be enough.

So, to calculate the capacitance using the free method, you need to use a known current. The battery specifications contain information about the current. A battery with a capacity of 3600 is charged for 36 hours with a current of 100 mAh. This means that the final result is obtained by multiplying two components: time and current. Therefore, knowing how much is required for a full charge, you can find out the capacity.

To measure capacity in another way, you will need to spend money. There are many smart chargers that can quickly measure capacity. They can be purchased at a specialty store or on aliexpress. They are used to measure various indicators, not just capacity.

A device that measures real capacitance

To implement the third method, you will need such parts as a battery, a watch, an ammeter with a flashlight. You need to insert the battery into the flashlight and turn it on at maximum power. An ammeter is needed to measure current. If the flashlight shines for 20 hours with a current consumption of 100 mA, then we get 20 * 100 = 2000 mAh.

How to drain a 18650 battery?

Let's carry out a safe discharge. To do this you will need:

• 12 volt incandescent lamp.
• 2 wires.
• Battery to discharge.

Now all that remains is to solder the wires to the lamp and connect to the 18650 battery. A smooth discharge will occur.

You can also perform discharge using a special unit shown in the video below.

The maximum discharge current can reach up to 35 A. But it is better that this is more a myth than a reality. It is best to use the gentle mode and discharge with a current of 1 ampere.

The discharge current should not be more than 2 times the capacitance value (2C). For example, a battery with a capacity of 2000 mAh will be equal to 4000 mAh. The voltage should not be less than 2.5 volts.

How to find out the release date of Panasonic and Sanyo Li-ion batteries?

Panasonic indicates on the batteries the model name, brief safety rules, and country of origin. A QR code unique for each battery is visible through the shrink film. Information about the date of manufacture is applied to the case and shrink film - in the form of 4 symbols near the negative contact. They are deciphered like this:

• 1 character – the last digit of the year of manufacture (2021 – 1, 2022 – 0, 2022 – 9, 2022 – 8, etc.);
• 2nd symbol – month – is indicated in order by numbers from 1 to 9, and then October – X, November – Y, December – Z;
• The 3rd and 4th digits are the day of the month.

The manufacturing date is also encrypted on Sanyo batteries.

How to check if a 18650 battery is working properly?

To check, use a regular multimeter. With this device we measure the voltage and determine the voltage of the battery. A normal 18650 battery contains 3.6-3.7 volts.

If the battery starts to get very hot during charging and its temperature reaches more than 40 degrees, it is better to get rid of it.

It is believed that when the voltage is less than 1 volt, these batteries need to be thrown away. But if it accepts a charge, you can still use the battery.

How to correctly determine the polarity on a 18650 battery

If you compare ordinary batteries with lithium ones, you will notice that the latter’s positive and negative terminals do not have much difference. However, it is quite easy to see where the plus and where the minus are. The positive contact has several small holes (3-4 pieces); it protrudes slightly forward. The negative contact has a completely flat surface.

How to make a battery from 18650 batteries?

To do this, you should prepare the following:

1. The required number of 18650 batteries.
2. Wires or thin tin plates.
3. Connector for power output. Or just two wires, preferably black and red.
4. Electrical tape or container in which the batteries will be securely fixed.

The battery assembly from 18650 batteries is carried out according to the following principle. The negative end must be connected to the positive end. It is worth deciding what kind of connection is needed, parallel or serial . The first saves space in length, and the second in width. The figure below shows what the second connection looks like. This is a laptop battery.

Scheme of sequential battery connection.

Parallel connection:

See the video for assembly details.

What is the meaning of the designation printed on the surface of 18650 batteries?

To figure it out, let's take a lithium-ion battery, brand ICR18650-26F M.

• “I” - this symbol marks all elements of this type, the production of which is carried out according to the same technological process.
• “C” indicates the material from which the cathode is made. For example, M stands for manganese, F for iron phosphate, C for cobalt.
• "R" stands for battery.
• 18650 - divided into two sections - 18, 65. Indicate the diameter and length.
• 0 – designation of shape, meaning cylinder.

Important! Battery labeling does not have the same meaning. Each manufacturer has it individually, so it can have big differences.

Application of 18650 batteries

So where are 18650 batteries used? This battery is used in various technical gadgets. Below is a list of them:

1. An 18650 battery is inserted into the flashlight.
2. It is needed for vaping or electronic cigarettes.
3. It can be used as an external battery with replaceable 18650 batteries. Essentially, it is a power bank with 18650 batteries.
4. Quadcopters.
5. Radio controlled toys.
6. Airsoft drives.
7. For powering electric motors.
8. Laptops.
9. Screwdrivers.
10. Drills.
11. Players.
12. Electric bicycles.
13. Portable telephone handsets.

Braid for 18650 batteries

When purchasing this battery, do not neglect the packaging. The case for 18650 batteries performs a protective function. Prevents accidental ingress of moisture and contact with metal. In addition, the 18650 battery is quite easy to carry in the box.

The braid looks like this:

How much do 18650 batteries cost?

Prices for this device are different everywhere. It all depends on the specific company, the characteristics of the battery and the store itself.

At the moment, the price tag for batteries with a capacity of 3500 mAh fluctuates around 1800 rubles. On Aliexpress it is 1000 - 2000 rubles. But you understand that you will have to wait a long time.

A battery with a capacity of 2500 mAh costs 200 – 1400 rubles.

The difference between 18650 and AA batteries

The main difference is this:

1. Size. It may be a couple of millimeters larger. It all depends on the specific model.
2. Charge. The voltage level is 3.7 volts. At the moment of energy accumulation it reaches 4.2-4.3 V.
3. Battery type. That is, it is recharged many times. Usually 500 – 1000 times.

If you want to replace the AA with an 18650 battery, be sure to check the voltage. By connecting two AA batteries we get 3 volts. And this device produces about 3.7 V. Therefore, it is better to use it in flashlights and equipment that can withstand excess voltage.

They can replace three AA or AAA batteries, but again there will not be enough energy. Again, you need to think about which products will operate at reduced voltage. The radio receiver and player may work fine, but the engine or heating element will work rather poorly.

Li-ion 18650 battery is susceptible to aging

The wear process occurs regardless of whether a li ion 18650 battery is used or not. There is an opinion that after a few years from the moment of manufacture they should be thrown away. Once a year the battery loses charge by as much as 10%. Before you buy it, look at what year it was made.

Another disadvantage is the inability to store discharged for a long time. This leads to damage. Aging also depends on the temperature that surrounds them. They can work perfectly from -20 to + 20 degrees. Some species are able to function at +50.

What does protected battery mean?

As a rule, lithium-ion batteries should have a voltage of 2.5-4.2 volts. There is a special defense that it was not rejected. It is made in the form of a small board with radio elements. This device is attached to the negative pole of the battery.

The board protects against overload and lock. It is soldered to the negative using a special metal tape. Such items are marketed under various brands. This microcircuit slightly extends this type of power supply. If there are two words Short-circuit and Protection, then the battery is protected.

There is also mechanical protection. It is triggered when a large amount of gas accumulates.

18650 specifications table

Where are 18650 batteries used?

The scope of batteries and the frequency of their use is much wider than many people think. Due to the fact that they are closed with special protection, they are not always visible.

Installed in the following devices:

• Laptops;
• Flashlights;
• Power Bank;
• Various gadgets.

They are used wherever ordinary AA batteries are unable to cope with the task. Li ion 18650 batteries have a higher capacity and voltage, they can be recharged and reused many times.

18650 battery repair

The protective board fails periodically. This electronic filling can be removed and the battery can be used again.

Step-by-step action plan:

1. Remove the cellophane wrapper.
2. After this, you will see a conductor running from the positive pole to the microcircuit. This whole thing is hidden under the minus. In the event of an emergency, the board breaks this contact.
3. Remove the board and remove the conductor. If necessary, spot welding can be cleaned with sandpaper.
4. It is worth removing the shell enough so that the contact of the device touches the contact of the battery.
5. Now wrap it with tape or a special adhesive film and you can use it.

After doing these steps, the 18650 battery will lose 1 millimeter.

Protecting lithium-ion cells

To ensure the safe operation of lithium-ion batteries, a special printed circuit board is installed that maintains a minimum voltage of 2.54 V.

The board is soldered directly to the battery contacts using thin aluminum tape. Typically, manufacturers that produce such lithium-ion products in large quantities do not install a protection board. All unprotected batteries are installed in devices equipped with a charge controller, for example, a laptop.

Rugged 18650 lithium-ion batteries are produced in China. They solder a protection board to the unprotected battery. The resulting structure is wrapped in a special thermal protective film. The length of such a battery is slightly larger, approximately 1.52 mm.

Protected elements are installed in devices where there is no charge controller. The most common is the installation of such elements in LED lights. The protection prevents lithium cells from being completely discharged.

Good to know! Installing protection increases the length of the 18650 lithium-ion battery. If several elements are installed at the same time, the increase is cumulative.

In other words, a set of these batteries may not fit in the flashlight housing. It will prevent the lid from closing tightly with the negative contact.

The installed protection will not be able to protect the product from overheating. It performs only one function - it controls the voltage level. It is completely safe to use an unprotected 18650 battery if only one cell is installed. When installing several elements, installation of protection is mandatory.

Battery protection

Today, the types of batteries presented are available complete with a special controller or contain manganese. Previously, batteries were produced without protection. In this case, you needed to know how to charge an 18650 battery correctly for your own safety.

The fact is that a device that did not have special protection could overheat greatly if it was charged incorrectly or for too long. In this case, a short circuit and even a fire or explosion of the battery could occur. Today, the use of such structures has sunk into oblivion.

All lithium-ion batteries are designed to protect against such negative phenomena. Most often, a special controller is used. It monitors the battery capacity level. If necessary, it simply turns off the battery. Some types of structures contain manganese. It significantly influences the chemical reactions inside. Therefore, such batteries do not need a controller.

Charging Features

Many buyers are interested in how to charge a 18650 Li-Ion battery (3.7V). You need to familiarize yourself with the features of such a process. It's quite simple. Modern manufacturers make special devices that control battery charging.

Lithium-ion batteries have virtually no memory effect. This provides a set of rules when charging and operating batteries. The memory effect is a gradual decrease in battery capacity when it is not fully discharged. This property was typical for nickel-cadmium batteries. They had to be completely discharged.

Lithium-ion batteries, on the contrary, do not tolerate deep discharge. They need to be charged to 80% and discharged to 14-20%. In such conditions, the device will serve as long and productively as possible. The presence of special boards in the design simplifies this process. When the capacity level drops to a critical value (most often to 2.4 V), the device disconnects the battery from the consumer.

Where and how it is used

There are three most popular applications for 18650 batteries:

• Powerful LED lights. They fully reveal both advantages of Li-Ion technology. Firstly, this is a higher voltage compared to standard batteries, which is needed for powerful diodes. Secondly, this is a high capacity, which is necessary for long-term use at night without recharging.
• Hand-held cordless drills, also known as screwdrivers. When used in this type of tool, multiple 18650 rechargeable batteries are combined into a Power Bank. This provides a high starting current, allowing you to work with a high traction load. And a high capacity, which provides several hours of continuous operation, which is especially valuable during installation work on the roof or walls of a building.
• Laptops. In modern laptops, 18650 batteries are also used combined in 6-8 pieces in a Power Bank. The main advantage here is the high capacity of the batteries, providing several hours of continuous operation. And also the ability to recharge them while the laptop is turned on from the mains. The main thing is to switch to offline mode when fully charged, otherwise the battery life will slowly decrease.

In the last few years, vaping devices have also begun to be equipped with 18650 batteries.

Types of chargers

There is a simple method on how to charge an 18650 battery with a charger. To do this, you will need to buy a certain type of device. There is a large selection of charging equipment for batteries of this type on sale. The simplest and most inexpensive is a device for one battery. The current level in it can reach 1 A.

Devices that can accommodate several batteries at once are very popular. Most often, such designs are equipped with an indicator. Some models can also be used for other types of lithium-ion batteries. Their landing nests are designed accordingly. Such devices are distinguished by reasonable cost and high functionality.

Universal chargers are also available for sale. They can charge not only lithium-ion batteries, but also other types. Such units must be properly configured before carrying out the procedure.