What is the difference between 26650 lithium battery and 18650 lithium battery?

Both 26650 lithium battery and 18650 lithium battery are cylindrical lithium batteries. What is the main difference between the two?
Here we present some comparisons between the two batteries.

Both 26650 lithium battery and 18650 lithium battery are cylindrical lithium batteries. What is the main difference between the two?
Here we present some comparisons between the two batteries.

26650 lithium battery is a type of cylindrical lithium battery, which refers to a cylindrical battery with a diameter of 26mm and a length of 65mm. Generally used to call lithium batteries, including lithium primary batteries and lithium-ion batteries. Common lithium batteries made of nickel-cobalt-manganese cathode materials and lithium iron phosphate materials—INR26650-3.6V-4500mAh, IFR26650-3.2V-3200mAh. Used in electric tools, lighting, wind and solar energy storage, electric vehicles, toys, instruments, UPS backup power supply, communication equipment, medical equipment and special lamps.

IFR26650-3200mAh
3.7v 2500mah -1

Common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. Lithium-ion battery voltage is nominal voltage 3.7v, charging cut-off voltage is 4.2v, lithium iron phosphate battery nominal voltage is 3.2V, charging cut-off voltage is 3.6v, capacity is usually 1200mAh-3350mAh, common capacity is 2200mAh-2600mAh . The theoretical life of the 18650 lithium battery is 1000 cycles of charging.

18650 batteries are mostly used for laptop batteries due to their large capacity per unit density. In addition, 18650 batteries are widely used in various electronic fields because of their excellent stability in work: often used in high-end glare flashlights , Portable power supply, wireless data transmitter, electric thermal clothing, shoes, portable instruments, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc.

What is the main difference between these two batteries?

1. The rated capacity is different: the rated capacity of IFR26650 lithium battery is 3000mAh, and the rated capacity of IFR18650 lithium battery is 1100~1400mAh.

2. The diameters of the two batteries are different: the diameter of the IFR26650 is 26 mm, and the diameter of the IFR18650 is 18 mm.

3. The reference quality is different: the production test quality of IFR26650 lithium battery is 94 grams, and the production test quality of IFR18650 lithium battery is 45 grams.

4. The battery volume is different: the volume of 26650 is larger than that of 18650. They have the same cell height and different cell diameters. The diameter of 26650 cell is 26mm, while the diameter of 18650 cell is 18mm.

5. The battery capacity is different: under the same battery material, the battery capacity of 26650 is larger than that of 18650. Assuming the same ternary material, 26650 battery is generally around 5200mAh, while the capacity of 18650 battery is mostly around 2600mAh.

6. Different application environments: 18650 lithium batteries are widely used in lighting lamp batteries, industrial supporting lithium battery packs, electric tool batteries, electric bicycle batteries, power lithium battery packs, etc., while 26650 lithium batteries are used in integrated solar street lamp lithium batteries There are many aspects such as group, energy storage machine station, solar energy storage battery and so on.

7. The battery life is different: 18650, that is, pointing at 18MM and height 65MM. From this point of view, 26650 must be larger than 18650 in terms of volume, so there is more space for filling materials to achieve greater capacity. Currently, 18650 The capacity is 2200, 2600, 3100MAH, etc., and the capacity of 26650 is generally 4000, 4200, 4500MAH, and the battery life will be longer.

Summary

The above is the detailed comparison of the differences between these two batteries. The 18650 lithium battery and the 26650 lithium battery are also completely different, but they can be refitted with each other, but there are also differences. Bold, put it in a flashlight with 26650.


Post time: Apr-28-2023