Charge Count in iStat

[msharpmu]

How many times can I charge my computer before the battery starts to diminish?

[WildCowboy]

It varies a lot based on usage patterns and other variables. As a ballpark figure, it wouldn't be unusual to see a significant reduction in battery capacity by around 300 cycles. But I've got another battery with about 500 cycles that still holds just about a full charge.

[Objectivist-C]

Deep discharges are hardest on the battery.