What exactly is the 18650 battery?

    1. High energy density. The capacity of some 18650 batteries can ensure a high of 2200mAh. If calculated, the energy density is about 500Wh/L, while the energy density of polymer batteries may be close to 600Wh/L in mass production. 

    2. Good insurance coefficient. We know that under the condition of lithium-ion batteries (if charging, high temperature, etc.), there will be strong chemical changes inside, causing a lot of gas. The 18650 battery uses a plastic shell with a certain compressive strength. When the internal standard air pressure reaches a certain level, the aluminum shell will crack and cause a terrible insurance production incident. This is also why individual houses that detect 18650 batteries must be maintained layer by layer, and it is judged that it is impossible to enter during inspection. There will be no problem with polymer batteries. Even in the condition of its transformation, because the compressive strength of the packaging film is low, the higher the standard air pressure, the more it will crack, and it will not be easily generated. The condition is to ignite. Therefore, in terms of the safety factor, polymer batteries are better than 18650 batteries.

18650 lithium battery has the following advantages: 

    1. Wide range of use: laptops, walkie-talkies, portable DVDs, instruments, audio equipment, model aircraft, toys, cameras, digital cameras and other electronic equipment. 

    2. Series connection It can be combined in series or parallel connection to form a 18650 lithium battery pack. 

    3. Small internal resistance. The internal resistance of polymer batteries is smaller than that of some liquid batteries. The internal resistance of domestic polymer batteries may even reach below 35mΩ, reducing the battery's self-consumption and extending the standby time of the mobile phone, which is completely possible to reach an international level. This polymer lithium battery that supports large discharge current is a fantasy choice for the remote control model and has become a product that is hopeful to replace nickel-hydrogen batteries. 

    4. No memory effect. No need to vent the residual power before charging, making it easy to use. 

    5. High voltage. The voltage of 18650 lithium batteries is 3.6V, 3.8V and 4.2V are much higher than the 1.2V voltage of nickel-cadmium and nickel-hydrogen batteries. 

    6. High insurance function: 18650 lithium battery has high insurance function, no, no incineration; non-toxic, non-contaminated, RoHS certified; various insurance functions work together, with a cycle of more than 500 times; good high temperature resistance, and discharge effect at the premise of 65 degrees. To avoid battery short circuit, the positive and negative of the 18650 lithium battery leaves. So the possibility of short-circuiting scenes has dropped. A maintenance board may be installed to avoid overcharge and discharge of the battery, which can also extend the battery's service life. 

    7. Long service life The 18650 lithium battery has a long service life, and the cycle life can reach more than 500 times during deformity utilization, which is more than twice that of individual batteries. 

    8. Large capacity: The capacity of 18650 lithium batteries is between 1200mah and 3600mah, while the capacity of some batteries is only about 800. If the 18650 lithium battery is combined to form a 18650 lithium battery pack, then the 18650 lithium battery pack may easily break through 5000mah.

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