Relation between Lithium battery lifetime and charging cycle

A battery standard technology nowadays is a lithium-ion polymer battery, this battery has a higher power density, that's mean it can guarantee higher battery life, but since mobile phone become longer and wider, Mobile phone power consumption is still very fast. So many users face the problem; can the phone connect to power at any time? Do we still need to wait for the battery run out and recharge?

In fact, the battery life of lithium electronics is determined according to the charging cycle. Taking the battery of the iPhone as an example, after completing the discharge cycle of 500 charging boxes, the power will drop to 80% of the original battery capacity.

A charge cycle means that all the battery power used up, but it is not equivalent to a single charge. For example, you can use the iPhone for a few hours a day, use only half of the power, and then fully charge it. If you do the same the next day, this can only counted as a charge cycle, not two, so you may have to spend several days to complete a cycle. Of course, the battery capacity will reduced a little after each charge cycle, so the battery will eventually be difficult to maintain a day of use, this time means you should replace the phone battery, or directly change the phone.

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