A modern Lithium Ion battery can stand charging to a total of some factor typically between 500 and 2000 times for a full charge from 0% to 100%. However, for a battery that will stand perhaps 500 of these full charges it will stand around 5000 charges of just 10% rather than the 100%. Furthermore, it makes no difference if you charge from 20% to 30% or 85% to 95%.
In other words, a battery that can stand 500 full charges from 0% to 100% effectively can be charged a total 500x100 or 50,000%. It makes no difference whether this total charge is in a large number of small charges or a small number of large charges.
The figures of 500 and 2000 full charges I mention above are just example figures and different batteries may be outside this range.
Finally, if the battery is to be left unused for a long time, it should be left with a charge state of 50% to 80% full. Leaving the battery fully charged may gradually reduce the performance; however, leaving the battery empty can seriously reduce the battery life.
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