So I'm planning on purchasing an 11.6 MBA in the next week or so, and have 1 question about battery management. I know that it has a "5 hour" battery life, and a "30 day" standby mode. And that sleep is different. How does this work? If I close the lid, do I put it into standby mode instantly? Is that a setting I can choose? And waking from standby, is that still "instant" awake? Is sleep for only when the lid is open? And if I were able to set it so that whenever I close the lid, even for 3 minutes, it goes to standby, would the battery life increase such that I could probably make it through the day with it, using it for maybe 4 hours, and having it be in standby mode for the rest of the day? Thanks!