The lifespan of lithium batteries is usually influenced by various factors, including usage habits, environmental conditions, battery type, and charging and discharging methods. The lifespan of lithium batteries is generally calculated based on the number of complete charge and discharge cycles, which is approximately 300-600 cycles. Different types of lithium batteries have different lifespans,

　　The theoretical lifespan of lithium iron phosphate batteries can reach 7-8 years.

　　The theoretical lifespan of polymer lithium batteries used in mobile phones at room temperature is 500-800 cycles of charging, but in actual use, 400-700 cycles is sufficient.

　　The theoretical lifespan of ternary lithium batteries used in automobiles generally ranges from 1000 to 2000 cycles, while the actual lifespan is approximately 4 to 8 years.

　　The theoretical service life of the soft pack lithium iron phosphate battery is about 1500 cycles. The battery life is more than 10 years for low current charging and discharging, and about 5 years for high current discharging.

　　Overall, the actual service life of lithium batteries is usually over 3 years, and for most users, the service life of conventional lithium batteries is approximately 3 years. However, these data are only for reference as everyone's usage habits and environment are not necessarily the same.

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