What is 18650 battery? 18650 is a very common lithium batteries, which are widely used in many of our rustling related items, such as mobile phones, we often use laptop battery power and it is the combination of the 18650 batteries made. Understand its application, here we come to understand one of its constituent Lithium-ion battery (Li-ion, Lithium Ion Battery): Lithium-ion battery is light weight, high capacity, no memory effect, etc., which have been widely used - in many digital devices now have adopted the lithium-ion batteries for power, Although its price is relatively expensive. High energy density lithium-ion battery, its capacity is 1.5 to 2 times the same weight of nickel-metal hydride batteries, and has very low selfdischarge rate. In addition, the lithium-ion battery is almost no "memory effect" and does not contain toxic substances, etc. It is also widely used in important reasons. Lithium is a metallic element, chemical formula Li, is an active metal, lithium why we want his name it? Because it is based on a positive level, "Put lithium" as cathode materials for batteries, this battery charging and discharging process mainly around the pros and cons of metal Li electronic processes undertaken. Also note that lithium batteries outside the general standard English 7.2V lithiumion battery (lithium battery) or 7.2V lithium secondary battery (lithium secondary battery), 7.2V lithiumion rechargeable battery (rechargeable lithium battery), so the user must when buying a battery see the battery block exterior signs, to prevent because there is no will to see the type of nickel-cadmium batteries, nickel hydrogen batteries mistaken for lithium batteries. 18650 is one model of a lithium-ion battery, the battery is a cylindrical steel, 18 denotes the diameter of 18mm, 65 representative of the height of 65mm (height) Capacity-type lithium battery capacity of 18,650 can now be done 2500mAh, magnification type of battery can be charged and discharged 2C normal use. Therefore, the power can be very large. Further, the material characteristics of the lithium ion battery when it is determined nominal voltage 3.7V, the voltage range is between 2.9--4.2V can charge and discharge. Cathode material is lithium-ion
compounds, high energy density, with the continuous development of metal active metal compound materials, energy density continues to increase, coupled with the optimization of the battery manufacturing process, the use of fully automated production equipment, as well as to enhance the capacity of the space.