I am using a MacBook Pro for work and have never used one before. It's really nice but one major quirk it seems to have is that I will set it to standby on Friday afternoon and then I start it again on Monday it will sometimes be completely drained and sometimes it will have about 50-70% battery left. I'm not understanding the wide disparity of remaining charge times for the exact same periods of time every week. Also , on the times it goes down to 0% , it is unusable , even when plugged in, until it gets up to about 2-4% and is very slow. I can't even log in if it is 0% battery when plugged in. It seems like it is always operating on battery even if it is plugged in. I would expect that when you plug something in , it should run like a normal laptop would. Are these things typical?