I have been looking but have been unable to find info about care for the new MB/P laptops other than calibration. For instance, when I am I am using it for a while is it better to just leave it plugged up at 100% charge or better to get it 100% then unplug wait till it is about to die and then recharge and repeat as needed? Side note, is it the same for an iPod?? Thanks in advance!!