Oh, I think I misunderstood your original comment. You were saying that she charged 90% each time, not charged from 90%. In that case, we're saying the same thi

Oh, I think I misunderstood your original comment. You were saying that she charged 90% each time, not charged from 90%. In that case, we're saying the same thing. Part of what I was talking about was, for example, I believe the Mac system profiler counts a cycle as any change from positive to negative discharge (or at least it did once upon a time), regardless of discharge depth. This gives Apple employees more opportunities to pull up your information and say "nope, sorry, your battery is expected to be dead after this many cycles", and make you feel like it's reasonable that you need to replace the battery.