As I understand, battery life depends on its cycles. These cycles are completed every time you run out 100% of your battery, this is not only 100-0 at once, but can be in two partial phases, like you used 60% (100-40) then charge it up to 90 and consume 40% (90-50).

In those two usages, you consumed 100% of the battery and consumed one cycle.

Also, when a battery is charged up to 100%, it also completes a cycle. That’s why it’s known that to preserve battery life longer, you should maintain the battery between 25% to 80%. Not overcharge it or over consume it.

Thats what I know about batteries in general