Hey guys, just picked up a 2014 MBA 11 from Best Buy a couple of days ago, with a full charge I'm seeing an estimated 6hrs battery time from the top bar. I have the brightness set to 10 boxes, no bluetooth. I have about 10 tabs open in Safari, and have Airmail and Dropbox open in the background. The first day I bought it and was setting things up and installing stuff, I got around 4.5hrs before I had to charge. I keep seeing people claiming 9hrs of battery life, can anyone help me figure out what might be wrong?