(1) According to the volume of lithium battery, 18650 lithium battery and 26650 lithium battery are completely different, but they can be modified each other, but they are also different. A thick cylinder is equipped with a thin battery. There is an adapter, which can thicken the 18650 battery and put it into the 26650 flashlight

(2) The battery capacity 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 single diameter of 26650 lithium-ion battery is 26mm, and that of 18650 lithium-ion battery is 18mm

(3) Compared with the same battery material, the battery capacity of 26650 is greater than 18650. Assume that the capacity of 26650 batteries with the same ternary material is generally about 5200mAh, while the capacity of 18650 batteries is mostly about 2600mAH

(4) Compared with the application environment, 18650 lithium-ion batteries are widely used in lighting batteries, industrial supporting lithium-ion battery packs, electric tool batteries, electric bicycle batteries, power lithium-ion battery packs, etc. 26650 lithium-ion batteries are widely used in integrated solar street lamp lithium-ion battery packs, energy storage stations, solar batteries, etc