Well of course it sticks out at the back - you can't put a quart into a pint pot! Some of it (two thirds) must reside outside, because there's three times the number of batteries in it! It's no big deal. When attached, the 'One' still fits into the supplied wallet, sort of, and actually benefits from a now slightly upward-tilting keyboard, which makes it nicer to type. I now have a seriously useful piece of kit, with more battery life than anyone else's laptop! True, it's a different shade of blue to the top of the case, and I wonder why they didn't make it black like the original, but hey, you won't see it with the lid up! Buy one today!