The lifespan and cycle life of lithium-ion batteries are core indicators to measure their performance and cost-effectiveness, which are directly related to the battery's use cost, reliability and application value. They run through the entire life cycle of the battery and are important reference bases for user selection, use and maintenance. Many people easily confuse the overall lifespan of the battery with the cycle life. The two are not only related but also fundamentally different. The overall lifespan covers multiple dimensions such as cycle life and storage life, while the cycle life is the key to determining the long-term use value of the battery. Scientifically understanding the differences and influencing factors between the two can effectively extend the battery's service life and maximize its use value.

　　The overall lifespan of a lithium-ion battery refers to the total time from its production and factory delivery to the point where it can no longer meet the use requirements and is completely scrapped, usually 3-10 years, depending on the battery type, application scenario and maintenance method. The cycle life specifically refers to the number of cycles of repeated charging and discharging under standard charging and discharging conditions until the capacity decays to less than 80% of the rated capacity, which is the core indicator to measure the durability of the battery. There are significant differences in the cycle life of different types of lithium-ion batteries. Among mainstream products, lithium iron phosphate batteries have a cycle life of 2000-5000 times, some high-end products even exceed 10000 times, ternary lithium batteries have a cycle life of 1000-3000 times, and lithium titanate batteries can reach more than 10000 times, adapting to the use needs of different scenarios.

　　There are four main factors affecting the lifespan and cycle life of lithium-ion batteries: first, charging and discharging habits. Overcharging and over-discharging will accelerate the aging of electrode materials and shorten the cycle life. It is recommended to maintain the power between 20% and 80% to avoid long-term storage at full or low power; second, the use environment. High temperature will accelerate electrolyte decomposition and electrode aging, while low temperature will reduce charging and discharging efficiency and damage the battery structure. The suitable use temperature is 10-35℃; third, battery type and process. Lithium iron phosphate batteries have better cycle life than ternary lithium batteries, and high-quality electrode materials and precision assembly processes can effectively improve the lifespan; fourth, maintenance methods. Regularly cleaning contacts, avoiding severe collisions, and using a dedicated charger can reduce battery damage. Reasonably controlling these factors can significantly extend the overall lifespan and cycle life of the battery. For example, a lithium iron phosphate battery used standardized can not only have a cycle life of more than 5000 times but also an overall service life of 8-10 years, which not only reduces replacement costs but also reduces the environmental pressure caused by waste batteries, promoting the sustainable development of the new energy industry.