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1. Soft pack lithium-ion battery life

(1) The theoretical service life of the soft pack polymer lithium-ion battery is more than 500 cycles, used in 3C products, with a lifespan of 3 to 5 years;

(2) The theoretical service life of the soft pack lithium iron phosphate battery is about 1500 cycles, with a low current charging and discharging period of over 10 years, and a high current discharging period of about 5 years;

2. Life of steel shell lithium-ion batteries

(1) The theoretical service life of steel shell lithium-ion batteries is 300 to 500 cycles, low current discharge, 2 to 3 years;

(2) The theoretical service life of the steel shell lithium iron phosphate battery is about 1000 cycles, with low current discharge for about 3 years;

In fact, the ways users use lithium-ion batteries are ever-changing, as the actual lifespan of lithium-ion batteries will vary depending on the usage conditions. In fact, the number of cycles of lithium-ion batteries is not only affected by different user usage methods, but also related to the production technology level and material formula of lithium-ion battery manufacturers.

In fact, the number of cycles obtained by different cycle systems is completely different. For example, the other conditions mentioned above remain the same. Simply changing the 4.2V constant voltage to 4.1V constant voltage to test the cycle life of the same type of battery, which is no longer a deep charging method, can increase the cycle life by nearly 60%. If the cut-off voltage is increased to 3.9V for testing, The number of cycles should be increased several times.

It is meaningless to talk about the number of cycles without considering the rules, as the number of cycles is a means of detecting battery life, not an end!

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