whats this? i hear it for the battery but not sure what it is. i ust got a macbook yesterday and have been leaving it plugged in and at times use it with the battery. my brother let it drain by accident.
The technique of battery calibration is really only necessary to make sure that the estimated battery life is accurately representative of what power is actually left in your battery.
Recalibration is only necessary as your battery ages. Lithium ion batteries deteriorate over time due to heat and oxidation, making your battery capacity less and less with every cycle.
Below are links to apple's info about your battery.