I highly doubt it. It's not like there is any leftover space inside these laptops. They made them thinner, and took out some of the screen bezel, making it a sm

I highly doubt it. It's not like there is any leftover space inside these laptops. They made them thinner, and took out some of the screen bezel, making it a smaller width and height as well. The battery life did not get worse, since they also use lower TDP chips (4980HQ -> 6920HQ on the highest end) and made other power improvements. A change to the battery size is definitely not a last-minute design decision you could make, since it depends on the logic board size and case size.