I don't understand what else to do on my macbook pro retina. I use it very lightly for web browsing and I start off with 100% battery and within two hours, it's at 65%. Is this a normal issue for having a retina model? If that's the case then I would give up retina and go for the macbook air. Any tidbits on how to improve my battery life or should I let Apple take a look at it?