Hey fellas, I use my MBP a lot for desktop and out and about use as well... Should I be concerned with leaving the AC plugged in all the time? Since I bought my MBP after it hits 100% for quite the while... I will un plug it and let the battery drain out pretty low. Am I better off leaving it plugged in? Or is it kind of like a cell phone where you should let it drain out and charge it back up to 100% for better lifetime?