"If your portable Mac has a built-in battery, you don’t need to calibrate the battery."
Also, this 'calibration' is just charging and discharging. Which happens normally. Also, the mac doesn't go to sleep, it crashes, so I guess it doesn't get calibrated.
It is about the battery controller learning how much charge the battery can still hold. Therefore it needs a completely empty battery and an uninterrupted full charge.
Also on the built-in batteries I found that it helps to get a more accurate battery estimate and improve the "battery health" rating.
Also, this 'calibration' is just charging and discharging. Which happens normally. Also, the mac doesn't go to sleep, it crashes, so I guess it doesn't get calibrated.
Maybe I'm holding it wrong. ;)