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

2021-06-25

1.Rated capacity is different: the maximum capacity of 26650 lithium ion battery is 5000mAh, while the capacity of 18650 lithium ion battery is 1200~2800mAh. Panasonic can achieve 3600mAh, but it is hard to see in the market.

26650 25

18650 3.7V 2000mAh 2


2. The diameters of the two batteries are different: the 26650 lithium ion battery has a diameter of 26mm and the 18650 lithium ion battery has a diameter of 18mm.

3. Different reference mass: the reference mass of 26650 lithium ion battery is 94 grams, while that of 18650 lithium ion battery is 43~47g.

4. Different battery sizes; The volume of 26650 lithium ion battery is larger than that of 18650 lithium ion battery. They have the same cell height and different cell diameters. The diameter of 26650 lithium ion battery is 26mm, while the diameter of 18650 lithium ion battery is 18mm.The 26650 lithium ion battery is thicker than the 18650 lithium ion battery.

5.Different battery capacities; Under the same battery material, the capacity of 26650 lithium ion battery is larger than that of 18650 lithium ion battery. It is assumed that the same ternary material 26650 lithium ion battery is generally around 5200mAh, while the capacity of 18650 lithium ion battery is mostly around 2600mAh.
6.Different application environments;18650 lithium ion battery is applied in lighting lamp battery, industrial supporting lithium ion battery, electric tool battery, electric bicycle battery, power lithium ion battery, etc., while 26650 lithium ion battery is applied in integrated solar street lamp lithium ion battery, energy storage machine station, solar energy and other aspects.
7.Different endurance time; The 18650 lithium ion battery has a diameter of only 18MM and a height of 65MM. It is small in volume and not too large in capacity.26650 lithium ion battery must be larger than 18650 volume ratio, so there is a larger space filling material, to achieve a larger capacity, the current 18650 capacity has 2200,2600,3100MAH, etc., and the 26650 capacity is generally 4000,4200,4500MAH, lead the battery life will be longer.

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