Lithium battery life is related to the number of completions of the charging cycle, not directly related to the number of charging cycles.
Simple understanding, for example, a lithium battery used only half of its power on the first day, and then it was fully charged. If it is still the case the next day, that is, use half of the charge and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several times to complete a cycle. Every time a charging cycle is completed, the power will decrease a bit. However, the reduction is very small. High-quality batteries will still retain 80% of the original power after charging for many cycles. Many lithium-powered products are still used as usual after two or three years. This is the reason. Of course, the life of the lithium battery needs to be replaced in the end.
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