At first, the individual reincarnation life of 3.7V 18650 lithium batteries can reach about 500~1000 times, and the individual life of 3.2V 18650 can reach more than 2000 times. Of course, the premise is that it is a pass battery produced by a regular manufacturer. If it is a sub-grade or mixed battery, the life will be very short. The service life of 18650 lithium batteries is only two to three years.
Individual lithium batteries may be charged and released 300-500 times. Local discharge of lithium batteries, not complete discharge, and try to avoid frequent complete discharge. Once the battery is off the production line, the clock starts to move. Whether you use it or not, the service life of lithium batteries is only two to three years. The life span of 18650 lithium battery is 300 to 500 charging cycles. Assuming that the power supplied by a complete discharge is Q, if the reduction of the current power in each charging cycle is not considered, lithium electricity may supply or make up for a total of 300Q-500Q of electricity during its life. From this, we know that if it is charged with 1/2 each time, it may be charged 600-1000 times; if it is charged with 1/3 each time, it may be charged 900~1500 times. And so on, if it is charged randomly, the number of times is variable.
One of the sayings that people often hear is that the life of lithium batteries is ;500 times; the principle of lithium batteries 500 times refers to the reincarnation life, that is, a complete charging and discharge cycle. The test method in the industry is: discharge depth × number of charges = reincarnation life. The numerically, the discharge depth is 80%, and at least 625 discharges, that is, 80%×625
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