New question, new post. Battery usage seems to be a lot poorer after updating to Maverick's. The only difference now is that I'm using Message Notifications for iMessage, FaceTime, an email. I know that keeping those open and running in the background will impact battery usage somewhat but it does seem to more than what I would expect. Or is it? Would calibrating my battery for the new OS improve that somewhat? -- Deja Moo: I've seen this bullshit before. Please respond to: replacing invalid with sonic.