Lithium-ion batteries have the characteristics of light weight, large capacity and long life. They are one of the most common battery types in our lives. Lithium-ion batteries are versatile and are used as a power source in many electronic devices. Below we mainly take a look at the 18650 battery and 26650 battery in lithium-ion batteries.

1.About 26650 battery

What is a 26650 battery?

The 26650 battery is a type of cylindrical rechargeable lithium-ion battery. The number of the 26650 battery represents the physical size of the battery, which refers to the diameter of 26mm and the length of 65mm.

Purpose of 26650 battery

26650 batteries can be used in many fields such as power tools, electric vehicles, communication equipment, lighting, medical equipment, etc., and have a wide range of uses.

Advantages of 26650 battery

1.With overcharge protection performance: After the battery is charged according to the standard, the battery is charged to 10.0V at a current of 3C under normal conditions, and then charged at a constant voltage until the current reaches 0.01C. The test results showed that the battery appeared to be in good condition and did not catch fire or explode.

2.With over-discharge protection performance:After the battery is charged according to the standard, the battery is discharged to 0V at a current of 0.5C under normal conditions. The test results show that there is no change in the appearance of the battery, and there are no safety risks such as fire.

3.With short-circuit protection:After standard charging of the battery, when the battery is dry and explosion-proof, the positive and negative poles are directly short-circuited to the center (the total circuit current is not greater than 50mQ). The test ends when the temperature drops to about 10°C below the peak temperature. Results showed the battery did not catch fire or explode.

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2.About 18650 battery

What is 18650 battery?

The 18650 battery is a standard lithium-ion battery model formulated by Japan's SONY. The basic naming rules of the 18650 battery are consistent with the 26650 battery. The numbers represent a diameter of 18mm and a length of 65mm.

Purpose of 18650 battery

18650 batteries are commonly used in portable lighting equipment, portable power supplies, medical equipment, electronic instrumentation, consumer electronics, and other fields. In addition, 18650 batteries can also be used in e-cigarettes. For example, there are special 18650 battery e-cigarettes on the market. 18650 batteries are widely used in various electronic fields due to their large capacity per unit density and good stability.

Advantages of 18650 battery

(1).Large capacity:The capacity ofthe 18650 battery is between 1200mAh and 3600mAh. If the battery pack is combined, its capacity can exceed 5000mAh.

(2).Long service life:The cycle life ofthe 18650 battery can reach more than 500 times under normal use.

(3).No memory effect:The18650 battery does not need to drain the remaining power before charging, which is more convenient for our daily use.

(4).Have a certain degree of safety: The 18650 battery has good high-temperature resistance and the ability to withstand internal pressure, so it has high safety performance.

(5).Wide range of applications:The 18650 battery can be applied to a variety of electronic fields and has strong applicability.

3.The difference between 26650 battery and 18650 battery

Different battery capacities:The capacity of 26650 batteries ranges from 2500mAh to 4000mAh. The power storage of 18650 batteries can vary between 1200mAh and 3600mAh. In comparison, the 26650 battery has a larger capacity.

The size and diameter are different:the diameter of the 26650 battery is 26mm, while the diameter of the 18650 battery is 18mm. Overall, the size of the 26650 battery is larger.

Different service life:Compared with the 18650 battery, the larger 26650 battery has more space to achieve greater capacity. So normally, the 26650 battery can last longer.

Different weights: The production and test mass of 26650 batteries is 94g, while the production and test mass of 18650 batteries is 45g. The weight of the 26650 battery is heavier.

Different discharge rates:Generally speaking, a 26650 battery with a larger capacity can provide more power for the operation of the device.

Different applications:Because of the difference in size and power, 18650 batteries are more used in lighting, electric vehicles, laptops, medical equipment, etc. The 26650 battery is mostly used in solar energy storage batteries, energy storage stations, etc.

4.Can 26650 batteries and 18650 batteries be used together?

 It is best not to use them together. Because there are differences in size, power, etc. between 26650 batteries and 18650 batteries, mixed-use may affect the life and performance of the battery and device.

5.Which one is better, 26650 battery or 18650 battery?

It's hard to compare and choose. Generally speaking, whether the battery meets your actual needs is the most important consideration when choosing a battery. You can carefully compare the 26650 battery with the 18650 battery to see which one is more suitable for your device at a time.

6.How to choose the right battery for your device?

(1).Review the device's instructions and guides. You can find the voltage, compatibility, etc. in the guide and use it to choose the right battery.

(2).Consider whether the battery is harmful or environmentally friendly. Some batteries contain toxic substances that may have adverse effects on your health.

(3).Consider battery durability. This ensures that you won’t need to buy new batteries for a while.

(4).It is best to choose a protected battery. It can effectively prevent safety hazards caused by battery overcharging or over-discharging.

Finally, if you want to know more about batteries, you can visit BatteryMall.com/support.