My MBP keeps shutting off when the battery hits about 30% or 45 minutes left. It just looses all life except the sleep light on the lid release latch. It has done this a few times now over the past few days and it's getting REALLY ANNOYING! I took a few screen shots while this was happening. These first couple are after it shut off and I plugged it in. As you can see, my battery life dropped undesirably low (iStat) and shows 0 capacity left.