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What does 18650 battery mean


What is lithium-ion battery?

Lithium-ion battery: It is a secondary battery, which mainly depends on the movement of lithium ions between the positive and negative electrodes. In the process of charging and discharging, Li+is embedded and de-embedded between the two electrodes: during charging, Li+is de-embedded from the positive electrode and embedded into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; The opposite is true when discharging. The battery generally uses materials containing lithium as the electrode, which is the representative of modern high-performance battery.

What is 18650 battery?

18650 is a standard lithium-ion battery model made by SONY Company of Japan, the ancestor of lithium-ion battery. Where 18 represents a diameter of 10 mm, 65 represents a length of 65 mm, and 0 represents a cylindrical battery.