Hi, I'm looking for a bit of advice on using my new MacBook Pro's battery (Retina, late-2013), and some of the information I've found online seems to contradict itself ... I use the Mac in my professional life, all day every day, usually from one location, so I've got continual access to a power supply. But if I want to preserve my MacBook's battery (for those rare occasions when I'm out of reach of a mains socket) for as long as possible, how should I treat the Mac's battery in my everyday use? I know it's bad to leave the computer plugged in all the time, but how often should I use the Mac's battery? Thanks.