Is 18650 a Lithium Battery?
2 Answers
18650 is the pioneer of lithium-ion batteries. Here is the relevant introduction about 18650: 1. It is a standard lithium-ion battery model set by Sony Corporation of Japan to save costs at that time. Among them, 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery. 2. Common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. The voltage of lithium-ion batteries is 3.7v, the charging cut-off voltage is 4.2v, the nominal voltage of lithium iron phosphate batteries is 3.2V, the discharge cut-off voltage is 3.6v, and the capacity is usually 1200mAh-3350mAh, with the common capacity being 2200mAh-2600mAh.
The 18650 indeed belongs to the category of lithium batteries, more specifically, it is a common model of lithium-ion batteries. I understand its naming is based on dimensional specifications: 18mm in diameter and 65mm in length. This cylindrical design is particularly popular in electric vehicles, such as Tesla's early models, which used these batteries to assemble large-capacity battery packs. Lithium batteries are characterized by high energy density and fast charging capabilities, but in automotive applications, special attention must be paid to heat dissipation and safety protection to avoid accidents caused by overcharging or short circuits. In actual driving, a good battery management system can extend the lifespan, and it is recommended that car owners regularly check battery health. In summary, the 18650 is a reliable and efficient choice, widely used in various devices.
