What is the life of a lithium-ion battery?
The life of a lithium-ion battery is a long period of time.
According to the definition of lithium-ion battery life, when the battery capacity drops to 80% of the rated capacity, the battery life is terminated. However, the battery capacity is less than 80%, the battery operating time is shortened, but the battery can also provide available power.
In general, lithium batteries can be used for 2-4 years and recycled for about 300 times. The length of life depends mainly on the following points:
Factors affecting the life of a normal battery:
1. Charge and discharge will reduce the active material in the battery and cause changes in chemical materials. This will increase the internal resistance of the battery and permanently lose capacity.
2. When the temperature rises and the voltage is at 4.2V full charge, the permanent capacity loss is the largest.
To extend battery life, it is recommended to keep the battery level 40% 3.6V.
Life effects due to abnormal use:
1. The battery can not be over-discharged. The battery is not stored for a long time. The battery has a protection circuit inside, which will continuously consume power. The battery will self-discharge. When the battery voltage is lower than a certain value, it will cause irreversible damage.
2. Overcharge, lithium battery charging requires high voltage accuracy, the general charge termination voltage is 4.2V, if it exceeds this value, it will seriously affect the life.
3. Improper use temperature and excessive discharge current will shorten battery life.