I have a MBP retina with 16 gigs of RAM and the 512 gigs SSD and while working at Startbucks this morning, I noticed the battery was down to 49 minutes and I had only been there for about an hour and a half. I had done a little web surfing (no videos) and a little work in Filemaker. I went home and let it drain till it got to standby power and then did a full charge. I started working at 3:00 p.m. and kept an eye on the battery indicator. I had set it to show the percentage remaining. I made backups of everything to a new USB 3.0 external hard drive and this took about 30 minutes. The battery was down to 96% - seemed very reasonable. I then let it sit for an hour and a half and watched the Spain vs France euro game and shortly after 5:00 and checked the battery indicator. It was down to just 46%. This was way out of line with my expectations. It's almost like when I was actually using it, the computer was very frugal on power usage, but when I just let it sit, it was much more hungry. Anyone have any similar experience. BTW, I have the brightness down to 6 clicks (out of 16) wifi on, backlit keyboard light practically off, and the resolution set to 1680 X 1050.