From the previous charts it is apparent that the impedance effect is most noticeable at high currents and low operating temperatures. This chart shows the effect of aging, or cycling a battery many times. As a cell is charged and discharged repeatedly, it can begin to “wear out” as the internal impedance gradually increases each time the cell is cycled. After 100 full cycles, an older cell will not deliver the same energy as it did when it was new.

