Source : EngadgetEngadget just published a new series of photos showing the lower part of the new MacBook case, and as expected, the battery is not part of the case anymore (reducing cost manufacturing):
It is now behind the lower cover. We learned that the famous hole on the side which has driven quite a lot of discussion on the web will host a button which will allow you to know at any time the battery charging status.
So, if Steve does not surprise us wit ha famous "one more thing" there is not much to expect from the coming keynote
[translation by Linathael]