What is the difference between 26650 lithium battery and 18650 lithium battery?
26650 lithium battery
26650 lithium battery is a type and specification of cylindrical lithium battery, which refers to a cylindrical battery with a diameter of 26mm and a length of 65mm. Generally used to refer to 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 the fields of electric tools, lighting, wind and solar energy storage, electric vehicles, toys, instruments and meters, UPS backup power supply, communication equipment, medical equipment, and special lamps.
18650 lithium battery
The common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. Lithium ion batteries have a nominal voltage of 3.7V and a charging cut-off voltage of 4.2V. Lithium iron phosphate batteries have a nominal voltage of 3.2V and a charging cut-off voltage of 3.6V, with a typical capacity of 1200mAh-3350mAh and a common capacity of 2200mAh-2600mAh. The theoretical lifespan of 18650 lithium batteries is 1000 cycles of charging.
18650 lithium batteries are mostly used as laptop batteries due to their large capacity per unit density. In addition, 18650 has excellent stability performance during operation and is widely used in various electronic fields, such as high-end high-power flashlights, portable power supplies, wireless data transmitters, electric thermal clothing, shoes, portable instruments and meters, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc.
What is the difference between 26650 lithium battery and 18650 lithium battery?
1. The rated capacity is different: IFR26650 lithium battery has a rated capacity of 3000mAh, while IFR18650 lithium battery has a rated capacity of 1100-1400mAh.
2. The diameters of the two batteries are different: the diameter of IFR26650 is 26 millimeters, and the diameter of IFR18650 is 18 millimeters.
3. The reference quality is different: the production quality of IFR26650 lithium battery is 94 grams, while the production quality of IFR18650 lithium battery is 45 grams.
4. Different battery volumes: The volume of 26650 is larger than that of 18650, and their cell heights are the same, but their cell diameters are different. The diameter of 26650 cell is 26mm, while that of 18650 cell is 18mm.
5. Different battery capacities: Under the same battery material, the capacity of a 26650 battery is larger than that of an 18650 battery. Assuming the same ternary material is used, the capacity of a 26650 battery is generally around 5200mAh, while the capacity of an 18650 battery is mostly around 2600mAh.
6. Different application environments: 18650 lithium batteries are widely used in lighting fixture batteries, industrial supporting lithium battery packs, power tool batteries, electric bicycle batteries, power lithium battery packs, etc., while 26650 lithium batteries are widely used in integrated solar street light lithium battery packs, energy storage stations, solar energy storage batteries, etc.
7. The battery life is different: 18650, which refers to a straight 18mm and a height of 65mm. From this perspective, 26650 must have a larger volume ratio than 18650, so it has more space to fill materials and achieve greater capacity. Currently, 18650 has a capacity of 220026003100mAh, while 26650 generally has a capacity of 400042004500MAH, resulting in a longer battery life.
The above is a detailed comparison and explanation of the differences between the 26650 lithium battery and the 18650 lithium battery. The 18650 lithium battery and the 26650 lithium battery are also completely different, but they can be modified with each other, but there are also differences. The thick body is used to install the thin battery, and there is an adapter that can thicken the 18650 battery and install it into a flashlight using the 26650.
Combining the excellent capacity characteristics and high consistency of 26650 lithium batteries, as well as the excellent structural design and mature manufacturing practice foundation of cylindrical batteries, 26650 lithium batteries will gradually replace 18650 lithium batteries in the application of power batteries.
