18650 Lithium Battery

18650 lithium battery is the originator of lithium-ion batteries - 18 of which means a diameter of 18 mm and 65 means a length of 65 mm, and 0 means a cylindrical battery.

The common 18650 battery is divided into a lithium ion battery and a lithium iron phosphate battery. The lithium-ion battery voltage is 3.7V, the charge cut-off voltage is 4.2v, the lithium iron phosphate battery has a nominal voltage of 3.2V, the charge cut-off voltage is 3.6v, the capacity is usually 1200mAh-3350mAh, and the common capacity is 2200mAh-2600mAh.