If we look at the leaked images from about a month ago showing an apple notebook case with a large area at the back missing for the battery and line this up with the screw holes near the front of the keyboard, they fit perfectly. Suggests that the battery will be at the back.
Yeah, I posted this photo earlier, on which I indicated where the larger part of the bottom case will reach.
(click to enlarge photo)
![TopCaseWithBottom.jpg](/proxy.php?image=http%3A%2F%2Fwww.megethos.com%2FPhrasikleia%2FTopCaseWithBottom.jpg&hash=879452e14a44cb52299f0210c567b296)