What are the characteristics of 18650 lithium batteries

It is generally believed that if the no-load voltage of the lithium battery is lower than 3.0V, it is considered to be exhausted (the specific value depends on the threshold value of the battery maintenance board, for example, as low as 2.8V and 3.2V). Most lithium batteries cannot be discharged with no-load voltage below 3.2V, otherwise excessive discharge will harm the battery (generally, lithium batteries on the market are basically only used with a maintenance board, so excessive discharge will also cause the maintenance board to fail to test. To the battery, and then unable to charge the battery). 4.2V is the highest limit voltage for battery charging. It is generally considered that charging the no-load voltage of the lithium battery to 4.2V is considered to be overcharged. During the battery charging process, the battery voltage gradually rises from 3.7V to 4.2V, and the lithium battery cannot be charged. Charging the no-load voltage to above 4.2V will also harm the battery. This is the special place for lithium batteries. Generally speaking, 18650 lithium batteries have the following advantages. 1. Wide range of applications: notebook computers, walkie-talkies, portable DVDs, instrumentation, audio equipment, model airplanes, toys, camcorders, digital cameras and other electronic equipment. 2. Series can be combined in series or parallel to form 18650 lithium battery packs. 3. Small internal resistance. The internal resistance of polymer batteries is smaller than that of ordinary liquid batteries. The internal resistance of domestic polymer batteries can even be below 35m, which greatly reduces the self-consumption of the battery and extends the standby time of the mobile phone. , Can reach the level of integration with the world. This kind of polymer lithium battery that supports large discharge current is an ideal choice for remote control models, and has become the most anticipated product to replace Ni-MH batteries. 4. There is no recall effect. It is not necessary to empty the remaining power before charging, which is convenient to use. 5. High voltage 18650 lithium battery voltage is generally 3.6V, 3.8V and 4.2V, much higher than the 1.2V voltage of nickel-cadmium and nickel-hydrogen batteries. 6. High safety function 18650 lithium battery has high safety function, no blasting, no incineration; non-toxic, non-polluting, and RoHS trademark certification; all kinds of safety functions are completed in one go, and the number of cycles is more than 500 times; high temperature resistance function is good, 65 degrees lower The electric power reaches 100%. In order to guard against the battery short-circuit phenomenon, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the possibility of short-circuit phenomenon has been reduced to the extreme. A maintenance board can be installed to guard against overcharge and overdischarge of the battery, which can extend the battery life. 7. Long service life The service life of 18650 lithium battery is very long, and the cycle life can reach more than 500 times in normal use, which is more than twice that of ordinary batteries. 8. The capacity of the 18650 lithium battery with large capacity is generally between 1200mah~3600mah, and the general battery capacity is only about 800. If the 18650 lithium battery is combined to form a 18650 lithium battery pack, the 18650 lithium battery pack can be broken at will 5000mah. Disclaimer: Some pictures and content of the articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: What is the reason for the loss of the laptop battery