EV battery

Do you know the meaning of these numbers 18650 and 26650

by：Vglory 2021-03-22

When we buy flashlights, we always see the use of AAA, AA, CR123A, 14500, 16340, 18650, 26650 and other batteries. So what do these numbers represent after all? The AAA and AA here are the No. 7 and No. 5 batteries, and the numbers above are actually the identification methods for industrial lithium battery cells. They consist of 5 digits. The first 2 digits indicate the diameter of the battery, and the three or four digits indicate It is the height of the battery in millimeters. 14500 is a lithium battery with a diameter of 14mm and a height of 50mm. The size is the same as our common AA battery. It's just that the voltage is different. AAA, AA, there are general disposable alkaline batteries, there are also rechargeable Ni-MH batteries, the highest voltage is 1.6V. 14500, 16340, 18650, 26650 belong to lithium batteries, the highest voltage is 4.2V. CR123A is a kind of disposable lithium battery, the size is the same as 16340, the highest voltage is 3V. Because the voltage of lithium battery is higher, and LEDVF value is also closer, so they drive LED with higher power. Ni-MH and disposable alkaline batteries have only 60%-70% power, and lithium power reaches 80%-90%. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.

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