(1) Considering various factors, the use characteristics of the iron lithium ion battery pack can be roughly described as: large volume, poor low-temperature performance, and relatively gentle decay rate within the service life, generally about 8 years; But if it is used in the south. The service life of lithium iron phosphate battery is more than 8 years. The service life of lithium iron phosphate battery pack is 4-5 times that of lead-acid battery pack. For lead-acid batteries with high technical content, there is no problem of reaching 5 years. Due to the collapse of the structure of the positive material graphite, lithium ion batteries will be abandoned even if they are not used for five years. I believe most consumers have heard that the service life of the lithium-ion battery pack is 500 times. After 500 times of charging and discharging, the battery will die.

　　(2) In order to prolong the service life of the battery, many friends charge the battery when it runs out. Is it really useful to prolong the service life of lithium ion batteries? The answer is no. The service life of lithium ion battery is 500 times. This does not mean the number of charges, but a charge discharge cycle. The service life of lithium iron phosphate battery pack is generally 300~500 charging cycles. Assuming that the power provided by full discharge is Q, if the power reduction after each charging cycle is not considered, the lithium battery can provide or supplement 300q-500q of power in total during its service life.

　　(3) It can be seen that if the battery is charged for 12 times, it can be charged for 600-1000 times; If you charge 13 times each time, you can charge 900~1500 times. If it is random charging, the number of times is uncertain. In short, regardless of charging, the total power is 300q~500q, which is constant. Therefore, we can also understand that the service life of the lithium-ion battery pack is related to the total battery charge, not the number of charges. Deep discharge and deep charge, shallow discharge and shallow charge have little effect on the life of lithium battery. In fact, shallow discharge and shallow charge are more favorable for lithium iron phosphate battery.

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