I just purchased a brand-new MacBook Pro, Retina (15" screen). The "Hello" pamphlet in the box starts out:
Your battery is charged and ready to go, so you can start using your Mac right out of the box.
However, the battery was completely drained. It charged up fairly quickly (I didn't time that, however) and the device functions fine.
I used it off and on for a total of around 40-45 minutes this morning -- usual web surfing with maybe 2-3 minutes of video, max. This took the power level down from about 94% to 75%. Then I closed the lid to see how the battery would hold up while the device slept. After 8 hours away at my office, I came back to find it at 70% (down from 75%).
Question Should the lack of charge out of the box be reason enough to return this thing? And is the draw-down on power I described indicative of the normal, expected battery performance?