650 Battery Specifications: Datasheet and Properties
One of the most popular and commonly found cells in the battery pack or power supply are 18650 battery cells, here we have listed all the possible technical 18650 battery specifications that can be very useful in implementing any technical design of your product or gadgets.
What is an 18650 battery? and specifications.
The 18650 battery is a Li-ion battery named after its 18mm × 65mm cylindrical size (diameter × height). When compared to AA size, it’s height and diameter both are larger. They are not replacements for AA or AAA size cells.
The 18650 battery has a nominal voltage of 3.6v and has capacity between 1200mAh and 3600mAh (read as mili-Amp-hours).
The battery type 18650 are popular in rechargeable and high current draining devices considering its high-level capabilities like 250 charge cycle and higher energy density.
The 18650 Li-ion battery due to its adaptability all around can be found in various fields, say, electric cars/ scooters, power banks, utility gadgets such as emergency lamps, torchlight, etc. Its safety property along with its high output current and energy capacity makes this battery popular among tech industries.
The 18650 battery specification includes its properties like the voltage, capacity, charge-discharge cycle, output current, output voltage and so on.
This is a generalized specification of 18650 Li-ion battery, only properties marked with the remark of “Standard” are common to all 18650 batteries else not.
This is to note that other properties such as capacity charge discharge cycles and capacity (mAh) are subjected to independent technologies to increase capability values to the consumers by doing research and development. All the 18650 specs are listed in table with detail. You might like this article on simple 18650 battery charger circuit with auto cutoff.
650 battery specification table:
Specs mention in above table is general, always check datasheet for accurate results.
8650 battery size / dimension:
The Standard 18650 battery size is 18 ✖ 65mm. The 18650 battery length is 65mm. The diameter of the 18650 battery is 18mm.
To be more precise, it has an approximate length of 65mm and an approximate diameter is 18mm but technically 18650 battery size is allowed with some tolerance in length and diameter.
Thus you could find specification written as, (say) 18 ± 0.41mm ✖ 65 ± 0.25mm on datasheet and features of li-ion cell.
Just remember 18 ✖ 65mm as a standard size, remaining things will be taken care of by designers and manufacturers of devices and batteries.
The size of the 18650 battery is allowed for the reason that, various gadgets or devices inhibit different locally developed technologies. That might not able to manufacture exact precise length diameter of either batteries or battery holding space, to fit the device or 18650 Lithium battery respectively.
650 battery data sheet:
The data sheet specification describes the technical parameters and standard tested output of each for the particular component or module. Here we have discussed 18650 battery data sheet, on paper its a li-ion rechargeable cell supplied by various electronics manufacturing companies.
There are hundreds of 18650 battery data sheets available belonging to different model of 18650 batteries, there are lots of different models available varying in current rating and charge holding capacity. Also top manufacturing companies have their cell model with inbuilt overcharge protection and short circuit protection circuit to prevent damage to the cell as well as device in which it is used.
List of top 18650 battery manufacturing companies along with the data sheets of popular 18650 battery:
Battery Model: Samsung 25R5 18650
Battery Model: Sony VTC6 18650 battery (US18650VTC6)
Battery Model: Sony VTC5 18650 Battery (US18650VTC5)
Battery Model : LG HG2 18650 Battery
Battery Model: Panasonic A 18650 Battery (NCR18650A)
From their data sheet you can analyze and study what parameters are to be considered. All these parameter to be keep in mind before, while and after manufacturing, testing and launching the a final product in the market.
We have discussed these 18650 parameters and properties in detail here.
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650 battery vs AA. key differences you need to know
Choosing between using a 18650 battery vs AA can be challenging as it is one of the most confusing battery topics. Modern devices must draw power from the correct type of battery to function correctly. This article provides a comprehensive and in-depth analysis of the specifications, differences and uses of 18650 battery vs AA, aiming to help you make the most appropriate choice between the two. In addition to the comparison of these two batteries, you may also want to know where to buy 18650 batteries. Our article also mentions a detailed answer to this question, and you’ll find advice below.
.What does 18650 mean on a battery? Why are 18650 batteries so popular?
18650 batteries derive their name from the dimensions of that battery. 18mm x 65mm. In other words, it refers exclusively to the size of the battery. All 18650 batteries are lithium rechargeable batteries. The primary reason why 18650 batteries are so popular is because you can recharge them 4,000 times. In addition, 18650 batteries are reliable and have a wide array of uses, for example, flashlights, some electric vehicles, medical equipment, etc.
.Everything you need to know about the 18650 battery
① What is the highest capacity 18650 battery?
The highest capacity 18650 battery has 3,600 mAh. Consider the following illustration to help you understand its capacity better: Your 18650 battery with a capacity of 3,600 mAh can deliver a current of 3600 mA (or 3.6 A) for one hour.
② How many times can a 18650 battery be recharged?
You can recharge your 18650 battery up to 4,000 times. If your 18650 battery uses lithium iron phosphate cells, it can be used for 10 years (4000/369 ≈ 10.96) on the premise of charging and discharging once a day on average. If you regularly use your 18650 battery under high-drain applications, the cycle life may reduce. Therefore, if you want to extend the cycle life of the 18650 battery, you need to control the battery cycle times and develop good charging and discharging habits.
③ What devices use 18650 batteries?
One of the reasons why the 18650 battery is popular is because of its wide array of applications. You’ll find the 18650 battery widely used in flashlights, laptops, cameras, electric vehicles, power banks, and remote-controlled toys, among others.
④ How do I choose an 18650?
- Battery capacity and discharge current. a higher battery capacity means that your battery can providelonger durations;
- Protection (cut-off technology). a good 18650 battery should be protected because it can become sensitive to charging, discharging, and environmental temperature conditions. Protected 18650 batteries prevent battery damage by monitoring your battery and shutting it down until better conditions are met;
- While unprotected 18650 batteries offer a slightly higher battery capacity, it would be better if you’d consider getting a protected one;
- Buy your 18650 battery from a reputable battery stores- you may find cheap 18650 batteries with a high capacity sold by sellers who have rewrapped batteries. You cannot verify the authenticity of the information provided on the rewrapped batteries, meaning they may be unsafe for use. The professional and trustworthy lithium batteries store is just the opposite. TYCORUN ENERGY is a battery store specializing in selling the best lithium batteries, and our products have undergone strict testing to ensure product quality;
- Flat top or button top (cathode side). most devices can use either the flat or button top. However, confirming which type your device handles best would be best.
.What is an 18650 battery equivalent to? Are 18650 batteries bigger than AA?
The nominal voltage of the 18650 lithium battery is 3.7V, which is equivalent to three nickel-cadmium or nickel-hydrogen batteries connected in series. On the other hand, AA batteries are either 1.2V (rechargeable) or 1.5V (disposable), so to get the same voltage as one 18650, you’d need the equivalent of 2.5 AA batteries connected end to end. Yes, there is a clear distinction between the two batteries by just looking at them. 18650 batteries are bigger than AA batteries. Remember, 18650 batteries have 18mm x 65mm as their standard dimensions. On the other hand, AA batteries have 14.5mm x 50.5mm.
.A complete guide to AA batteries
① Are 3.7 V batteries the same as AA?
3.7V batteries generally use lithium iron phosphate materials, and are usually rechargeable batteries. Unlike 3.7V rechargeable batteries, AA batteries are divided into two categories: rechargeable and non-rechargeable. Rechargeable AA batteries are usually nickel-metal hydride, nickel-cadmium and lithium-ion batteries, while non-rechargeable AA batteries are usually disposable alkaline zinc-manganese dioxide cells. As mentioned above, the biggest difference between 3.7V batteries and AA batteries is the voltage, 3.7V represents the nominal voltage of lithium iron phosphate batteries, while the voltage of AA rechargeable batteries is 1.2V, and the voltage of non-rechargeable AA batteries is 1.5 V
② What are the different types of AA batteries? Which AA battery is strongest?
There are four main types of AA batteries:
- Lithium-based (rechargeable) (Li-FeS2)
- Zinc Carbon
- Nickel-based (NiMH, NiZn)
The lithium-ion AA battery stands out when comparing the strengths of different AA batteries. Li-ion AA batteries produce a current between 3,000 mAh and 3,500 mAh, depending on the manufacturer. Other AA battery types, such as zinc-carbon, alkaline, and nickel-based, produce a current of 400 mAh. 1,500 mAh, 2,000 mAh. 3,000 mAh, and 700 mAh. 1,500 mAh, respectively. Consider the following table as a summary of the differences between the four main types of AA batteries:
Yes (Presence of Battery Management System (BMS) that protects the battery from overcharging and over discharging)
No (Cannot be recharged – get rid of it properly after depleting charge)
Does not have a self-discharge rate because it is not rechargeable. However, it has a shelf-life of 5 years
Extremely Low (2.3% per year)
High (1% daily or 30% per month)
③ What is the average life of a AA battery?
A typical AA battery should last for 2 to 3 years if handled correctly. Among them, lithium-ion AA batteries are long-lasting with a cycle life of 3 years even more if properly cared for and charged and discharged on time. However, different factors may affect the average life of AA batteries, these factors include battery usage, temperature, charging characteristics, etc.
④ How do you make AA batteries last longer?
Here’s how you can make your AA batteries last longer:
- It would be best to acquire rechargeable batteries instead of non-rechargeable ones. Rechargeable batteries will serve you for longer durations than non-rechargeable ones.
- Using your AA battery for the right job dictates how long your battery will last.
- Do not leave your batteries in unused devices.
- Some AA battery types, such as the NiCD and alkaline, may last longer by being refrigerated when outside temperatures are high. However, you’ll have to warm them up first before reusing them.
- Charging. some AA batteries, such as the alkaline and NiMH, require frequent charging to last for long. The good thing is that they do not consume a lot of electricity to recharge.
.In-detail comparison of 18650 battery vs AA
This section compares the differences and charging characteristics of the 18650 battery vs AA.
① What is the main difference between 18650 battery vs AA?
There are five main differences between the 18650 battery vs AA:
Can power devices for longer durations than AA batteries
Can power devices for shorter durations than 18650 batteries
Flashlights, laptops, cameras, power banks, electric vehicles, etc.
Ideal for high-drain applications such as electric tools, remotes, thermometers, etc.
② Can I charge 18650 battery with AA charger?
No, you cannot charge a 18650 battery using an AA charger. Remember, 18650 batteries have a nominal voltage of 3.7V, while AA batteries have 1.5V. An AA charger will not charge anything with a voltage of 2V and above since its cut-off voltage is 2V.
③ Can I replace AA battery with 18650?
No, you cannot replace (or use) an 18650 battery in place of an AA battery. The differences in their capacities and nominal voltages make it challenging to replace them, even if you connect AA batteries in series to increase their voltage. AA batteries have 1.5V x 3 = 4.5V, while a 18650 battery has a nominal voltage of 3.7V. Simply put, replacing your AA battery with a 18650 battery is not recommended.
④ 18650 battery vs AA, which is better?
You’ll need to consider their uses when comparing which battery is a better choice, the 18650 battery vs AA. If you wish to power devices such as flashlights, laptops, cameras, etc., a 18650 battery is a better choice. However, if you wish to power high-drain devices such as remotes, thermometers, and battery-powered hand tools, then AA batteries are most suitable.
Choosing between using a 18650 battery vs AA can be challenging as it is one of the most confusing battery topics. The primary reason why 18650 batteries are so popular is because you can recharge them up to 4000 times or more with proper use. There are four main types of AA batteries; Li-ion, zinc-carbon, alkaline, and nickel-based. Li-ion AA batteries are the strongest in that category. The highest capacity 18650 battery has 3,600 mAh. A lithium-ion AA battery has a capacity (highest) of 3,500 mAh. When comparing the sizes of the 18650 battery vs AA, the former is a little bit bigger (18mm x 65mm) while the latter is smaller (14.5mm x 50.5mm). hence the extra capacity.
Experts strongly discourage replacing 18650 batteries in places of AA batteries. The differences in their capacities, as well as their voltages, make it difficult to switch these batteries. Deciding which is better between the 18650 battery and AA depends on where you want to use the battery. 18650 batteries work best in power electronics such as laptops, cameras, flashlights, etc., while AA batteries work best in high-drain applications such as electric tools, thermometers, remotes, etc. Using your batteries according to their intended purpose and charging them correctly will help you have long-lasting batteries. they’ll serve you for a long time.
In addition to the comparison with AA batteries, the difference between 18650 batteries and 4680, a relatively advanced large cylindrical battery technology, has also received widespread attention. Our website summarizes the content of 4680 battery vs 18650 for you, so that you can get more comparative analysis of the two generations of cylindrical batteries.
650 Battery vs. AA Battery
Both 18650 and AA batteries are cylindrical batteries that differ in size, and that come in various types of battery chemistries, thus differing in the battery voltage, capacity, and other charging/discharging characteristics.
In order to simplify finding the batteries for their devices, some manufacturers ship their 18650 devices (mostly flashlights) with an AA battery holder that allows AA batteries to be used in the 18650 battery compartments. But is this actually a good idea?
Updated: November 4, 2022.
650 and AA Batteries Features and Specifications
18650 batteries are rechargeable lithium-ion batteries featuring physical dimensions of 18 × 65 mm (0.70866 x 2.5590 inches), a nominal voltage between 3.2 and 3.7 volts, and a nominal capacity between 1800 and 5000 mAh.
Since lithium-ion batteries are relatively sensitive to charging and discharging conditions, some 18650 batteries feature a small Battery Management System (BMS) that protects the battery from unwanted events. such 18650 batteries are called protected 18650 batteries.
Also, 18650 batteries differ in the form of the positive terminal. there are flat top batteries and button-top batteries.
Which type suits your needs, You have to find it by reading the manual of the device you have.
Since lithium chemistries don’t suffer from the memory effect, 18650 batteries may be recharged as soon as one can put them in the charger, assuming that they are not too warm or too cold.
The most popular 18650 battery brands are Panasonic, Samsung, LG, Sony, Molicel, Epoch, and similar.
AA batteries feature physical dimensions of 14.5 x 50.5 mm (~0.571 x 1.988 inches) and are available in numerous chemistries, as shown in the following comparison chart:
|Chemistry||Common Name||Rechargeable||Typical Capacity (mAh)||Voltage (V)|
|Zinc Carbon||R6, 15D||No||600. 1600||1.5|
|Alkaline||LR6, 15A||No (Mostly No)||1800. 2700||1.5|
|Li-FeS2||FR6, 15LF||No||2700. 3300||1.5 (1.8 max)|
|Li-ion||14500||Yes||600. 2000||3.6. 3.7|
|NiCd||KR6, 1.2K2||Yes||600. 1200||1.2|
|NiMH||HR6, 1.2H2||Yes||700. 2800||1.2|
|NiOOH||–||No||2200. 2700||1.5 (1.7 max)|
|NiZn||ZR6||Yes||1500. 1800||1.6. 1.65|
Standard AA battery is a non-rechargeable alkaline AA battery featuring a nominal voltage of 1.5V and a typical capacity of 1800-2700 mAh.
Note: one of the oldest AA battery chemistries is Zinc-Carbon chemistry with a nominal voltage of 1.5V and a typical capacity of 600-1600 mAh. But, since they feature a relatively high self-discharge rate and are prone to leakages, they are mostly replaced by alkaline AA batteries, although they are still available on the market.
Because of differences in size and chemistry, 18650 and AA batteries are able to store different amounts of energy:
- High-drain 18650 battery, 3.7V 2000 mAh: 7.4 Wh,
- Low-drain 18650 battery, 3.7V 4000 mAh: 14.8 Wh,
- High-capacity, low-drain 18650 battery, 3.7V 5000 mAh: 18.5 Wh,
- Alkaline AA battery, 1.5V, 1200 mAh: 1.8 Wh,
- Lithium-ion AA (14500) battery, 3.7V, 1500 mAh: 5.55 Wh,
- NiOOH (Nickel Oxy-Hydroxide) AA battery, 1.5V 2500 mAh: 3.75 Wh,
- NiMH (Nickel Metal-Hydride) AA battery, 1.2V 2000 mAh: 2.4 Wh, etc.
- Li-SOCl2 (Lithium-Thionyl Chloride), 3.6V 2700 mAh: 9.72 Wh
As one can see, the main difference between 18650 and AA batteries is the difference between the amounts of stored energy, with some models of 18650 batteries being able to store 14.8 (or even more) Wh of energy, while the best AA batteries are unable to store more than 5-6 Wh of energy.
Note: Li-SOCl2 (Lithium-Thionyl Chloride) AA batteries are able to store 8-10 Wh of energy and are directly compatible (using a battery adapter) with 18650 batteries due to the very similar voltage, but Lithium-Thionyl Chloride chemistry supports very low discharge currents when compared with 18650 discharge currents.
So, if You are going to replace the single 18650 battery with the battery adapter holding one AA battery, be aware that the output power and the amount of energy are going to be decreased.
Personally, it may be great to have the option to choose between the batteries, but the 18650 battery simply stores much more energy than the AA battery and should be a preferred choice for many devices and gadgets, especially for high-drain devices.
650 and AA Batteries Frequently Asked Questions (FAQ)
Here are some of the most common Frequently Asked Questions (FAQ) about 18650 and AA batteries:
Can you use AA batteries instead of 18650?
No, generally, a AA battery cannot replace a 18650 battery due to the differences in size, voltage, energy being stored, discharge characteristics, and similar.
However, some devices come with a battery adapter allowing the users to replace one 18650 battery with one AA battery, sacrificing the runtime and often performance.
Is a 18650 battery the same as an AA?
No, these batteries differ in size and hence discharge performance. While 18650 batteries feature various lithium chemistries, AA batteries feature even more chemistries.
But, the main difference is the size and the voltage of the most commonly used 18650 and AA batteries:
- 18650 battery: 18 × 65 mm (0.70866 x 2.5590 inches), 3.6V
- AA battery: 14.5 x 50.5 mm (~0.571 x 1.988 inches), 1.5V
What is a 18650 battery equivalent to? Can I use 2 CR123 instead of 18650?
18650 battery is equivalent to a 18650 battery, and that’s it.
There are several batteries of similar size, for example, 19670.
But, some devices allow the users to use, for example, two CR123A batteries instead of 18650 without sacrificing the performance.
For more about this topic, feel free to check our 18650 Battery vs. 2x CR123A Batteries vs. 3x AAA Batteries article.
What is so special about the 18650 battery? What battery is bigger than the 18650?
18650 battery is an excellent battery. it is able to store plenty of energy, it features high power output, it is not too large, and it features a relatively large area, which improves cooling.
Thicker batteries, like 26650 and 32650, are able to store even more energy, but when being discharged with really high currents, these batteries will overheat faster than the 18650 batteries.
But, 18650, 26650, 32650, and similar batteries are commonly used in high-drain devices, including laptops, electric vehicles, cordless tools, high-output flashlights, and similar.
Note: Amazon links open in the new Windows, feel free to check them for the most up-to-date offers and prices.
- 18650 Battery vs AA Battery
Lithium Battery: 18650 VS 32650
In previous post, we have discussed about differences between lithium 18650 batteries and lithium 26650 batteries. As we all known that, there are many types of cylindrical lithium batteries such as 18650, 26650, 21700, 32650 and so on. There are also some differences here between lithium 18650 batteries and lithium 32650 batteries. Let’s have a look. The following is the table about the article.
What is lithium 32650 battery?
Lithium 32650 batteries are one of the largest standard size cylindrical rechargeable lithium batteries based on several similar lithium battery chemistry. Lithium 32650 batteries are commonly used in high-power flashlights and other similar high-drain devices like lithium 26650 batteries. Many electric scooters, electric bikes and other electric vehicles requre this kind high capacity lithium batteries.
Physical Dimensions: height: 65mm diameter: 32mm
Specifications: nominal voltage: 3.2-3.7V nominal capacity: 5000-8500mAh
Mainly Cathode materials:
Manganese Oxide, Lithium Manganese Nickel, Lithium Irom Phosphate. Lithium Cobalt Oxide
Because different chemical materials have different structure or characters, each of them has different characters.
– IMR 32650 batteries feature LiMn204 (Lithium Manganese Oxide) chemistry. Their nominal voltage is 3.6 – 3.7 V per cell, with a maximum recommended charging voltage of 4.2 V. IMR batteries commonly have a smaller capacity but are capable of delivering larger currents.
– INR 32650 batteries feature LiNiMnCoO2 (Lithium Manganese Nickel) chemistry. These batteries are very similar to IMR batteries since they can provide plenty of currents, with slightly lower capacity. For example, IMR32650 and INR32650 batteries that feature a capacity of “only” 6Ah (6000 mAh), which are able to provide 20-30C currents are actually able to provide currents of 120-180 Amps, with some models being able to deliver even more. And that is a lot of power from a battery that on average weighs 135-170 grams (~4.5-6 ounces).
– IFR 32650 batteries feature LiFePO4 (Lithium Iron Phosphate) chemistry. Their nominal voltage is 3.2 – 3.3 V per cell, with the maximum recommended charging voltage of 3.5 – 3.6 V.
– ICR 32650 batteries feature LiCoO2 (Lithium Cobalt Oxide) chemistry. Their nominal voltage is 3.6 – 3.7 V per cell, with the maximum recommended charging voltage of 4.2 V. They commonly have higher capacities, but maximum allowed currents are often limited to just a few C.
How many volts and Ah are there with lithium 32650 cells 3p8s?
Generally speaking, set single lithium cell parameters: nominal voltage—3.7V capacity—5000mAh
What is protected lithium 32650 battery?
Most of lithium 32650 are marked with “PROTECTED”, it means that there is a Battery Management System(BMS）insde the lithium battery. BMS is the protector to prevent lithium batteries from damage of short circuit, over-charging or high-temperature and etc. details on Battery Management System
Lithium 18650 Battery
Physical Dimensions: height: 65mm diameter:18mm
Specifications: Nominal voltage: 3.2V Charging cut-off voltage: 3.6V Capacity: usually 1200mAh-3350mAh The common capacity: 2200mAh-2600mAh Cycle life: 1000 cycles of charging
Application of Lithium 18650 Battery
It is commonly used in high-end glare flashlights, portable power supplies, wireless data transmitters, electric heating, warm clothing, shoes, portable instrumentation, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc. Due to the large capacity per unit density, most of it is used for laptop batteries. In addition, because the stability of 18650 at work is very good, it is widely used in major electronic fields.
Advantages of 18650 Lithium Battery
Large Capacity The capacity of 18650 lithium batteries is generally between 1200mah and 3600mah, while the general battery capacity is only about 800mah. If combined into a 18650 lithium battery pack, the capacity of 18650 pack can easily break through 5000mah.
Long Life The 18650 lithium battery has a long service life. And the cycle life can reach more than 500 times during normal use, which is more than twice that of ordinary batteries.
High Safety Performance The 18650 lithium battery has high safety performance. For one hand, It do not explode and catch fire. On the other hand, it is non-toxic and non-polluting.
We can see its structure. There is a galvanized steel shell to endure inner pressure. Thus it will not explode.
Further more, 18650 lithium battery has passed RoHS( Restriction of Hazardous Substance) trademark certification.
As we mentioned above, the number of cycles is greater than 500 times. It has good high temperature resistance. Because and the power-up efficiency can reach 100% even under 65℃.
In order to prevent short-circuiting of the battery, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the probability of it short-circuiting is extremely low.
In order to avoid overcharging and over-discharging the battery, a protective board is installed inside. This method also can extend the service life of the battery.
High Voltage The voltage of 18650 lithium batteries is generally 3.6V, 3.8V and 4.2V, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-metal hydride batteries.
No Memory Effect The 18650 lithium battery does not have to empty the remaining power before charging, which is easy to use.
Small Internal Resistance The internal resistance of polymer batteries is smaller than that of ordinary liquid batteries. The internal resistance of domestic polymer batteries can even be below 35mW, which greatly reduces the self-consumption of the battery and extends the standby time of the mobile phone.
This is completely in line with international standards. This kind of polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and has become the most promising alternative to nickel-metal hydride batteries.
Wide Usage 18650 battery can be used for notebook computers, walkie-talkie, portable DVDs, instrumentation, audio equipment, model aircraft, toys, video cameras, digital cameras and other electronic equipment
8.Flexible Battery Pack Custom details on customing 18650 lithium battery packs. It can be combined in series or in parallel into a 18650 lithium battery pack.
Disadvantages of 26650 lithium battery
Because the 26650 lithium battery has a small range of use and its performance status has been replaced by the 18650 lithium battery, many manufacturers no longer produce this battery.
Both the 26650 lithium battery and the 18650 lithium battery belong to cylindrical lithium batteries. So, what is the difference between the 26650 lithium battery and the 18650 lithium battery? Let’s take a look at the difference between 26650 lithium batteries and 18650 lithium batteries.
650 Lithium Ion NMC Cells Vs 32650 LiFePO4 Cells
These are two different types of batteries. 18650 is an MnNiCo ternary lithium battery with a diameter of 18mm and a height of 65mm. 0 represents the battery type: Round 32650 is a LiFePO4 lithium iron phosphate battery with a diameter of 32mm and a height of 65mm. 0 represents the battery type.：
Round batteries have different diameters and different capacities. It is generally believed that the battery capacity of 32650 is twice that of 18650.
Advantages and disadvantages: The 18650 capacity of the ternary lithium battery is too large, so for the same capacity requirements per unit volume, the number of batteries required is small.
However, the internal structure of the ternary lithium battery is unstable, it can easily explode at high temperatures (above 60C), and the risk factor is high. LiFePO4 battery has a stable internal structure. High/Low temperature resistance and high safety tolerance are its great advantages.