Hugo Boss 5321 wrote:
One of the key things I have realised from these discussions is that people are saying it's bad to leave a mac charging, it's bad to fully decharge a mac, and it also seems alright to not charge it fully or decharge it fully before charging. These were all kind of confusing to me as I thought to keep a battery healthy, you had to completelly drain it before charging it, charge it fully whenever you charge it, and it didn't hurt to keep it charging constantly.
FALSE information. You may leave your MBP attached to the charger as much as you want. It cannot over charge. Avoid draining the battery completely. That will shorten battery life.
I keep mine charging all the time but about one per mont will use it with just the batter yo about the 40% charge level.
And if I am charging it on and off at school, what will happen (i.e. one period I charge it 20%, then unplug it and then charge it another 20% the next period)
You sometimes have to deal with realities. When Ac is available, use it, but it will not be so at all time. It will not have a great adverse affect on the battery.
Here are some articles that you should read that will fill in the details: