Hey Everyone, Just got a new MBP 2015. Battery is down to 30% on its first cycle. Should I run it all the way down to zero% (or close to it), before charging? Some people say if you charge it before it's at zero you "train" the battery that it needs to be charged sooner, and the time the battery lasts before needing to be charged again will be less. Some people say it's better not to let it go so low. Better to charge it when it's more like 30 or 50%, for example. Which of these is true?!? Basically, what's the best treatment for a new battery to keep it powering the laptop for as long as possible each cycle?