Lithium primary cell.18650 battery 3.7v 3500mah

　　Lithium primary cell

　　Lithium-manganese dioxide battery (CR)

　　With lithium metal as the negative electrode, with heat-treated manganese dioxide as the positive electrode, the isolation film is pp or PE film, the cylindrical battery is the same as the lithium-ion battery diaphragm, the electrolyte is an organic solution of lithium perchlorate, cylindrical or button type. Batteries need to be produced in a dry environment with humidity ≤1%.

　　Features: low self-discharge rate, annual self-discharge can be less than 1%, fully sealed (metal welding,lazer seal) battery can meet 10 years of life, semi-sealed battery is generally 5 years, if the work is not well controlled, it can not reach this life. Yi Wei has done a better job in the development of cylindrical lithium manganese batteries, and has now realized automated production, and the battery can be tested without explosion such as short circuit and overdischarge.

　　Generally on the desktop computer motherboard, there is a button type lithium battery, providing a weak current, can be used normally for about 3 years, some hotel access cards, instruments, etc., also use lithium - manganese dioxide batteries, in recent years, the use of decreasing year by year.

　　Lithium-thionyl chloride battery

　　With lithium metal as the negative electrode, positive electrode and electrolyte as thionyl chloride (sulphone chloride), cylindrical battery, assembly is complete, voltage 3.6V, is one of the battery types with the most stable operating voltage, and is also the battery with the highest capacity per unit volume (mass) at present. It is suitable for use on electronic instruments and equipment that cannot be maintained frequently to provide a small current.

　　Other lithium batteries are lithium - ferrous sulfide batteries, lithium - sulfur dioxide batteries and so on.

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