Hi I have done searches and checked the guides but I am still a bit confused. I just got my macbook 2.4 a week ago and the battery will now only charge to 99%. What is the best way to use it to keep the battery in good condition. I am normally near a power source but I read that apple do not advise to use the macbook plugged in so that what I have been doing. Should I calibrate the battery ? Advise would be much appreciated as I am completely new to macs.