Since updating my MacBookPro11,1 (i7, 3 GHz, 16 GB) a few days ago, I see terrible battery usage. Usually I can go for hours on 20-30%, but today it has taken a mere 1 hour to use 40%. Nothing major running on the MacBook; Outlook, Firefox, Excel), nothing external connected, and no heavy calculations. Is it my MacBook, or an OSX Beta thing? Anyone?