I ply my trade mostly on my Macbook Pro, though now, I have a desktop at the office upon which I do the MS Office coding. As most people do, I don't really use it as a laptop away from power sources and such running on a battery. No, I use it mostly as a lightweight transportable, and plug it in where ever I happen to drop anchor. I think that may have contributed to my problem displayed in the pretty image below. BTW, coconutBattery is a nice little free app.