You’ve got to love iFixit.
That being said, the firm has performed a complete teardown of Apple’s newest low-end MacBook and noticed that only the central processing unit, the graphical processing unit and the battery have changed since the last hardware iteration.
iFixit has stated that the battery itself is of special interest given that the battery is exactly the same shape as its former and all you have to do to get an extra 350 mAh for your existing plastic MacBook is to drop in a refreshed battery.
While the new cells weigh more and it’s likely the new silicon that’s actually responsible for 10 hours of battery life, but should your Li-ion pack fail under warranty, your older MacBook might be returned with more juice than you’d bargained for.
Kind of a cool thing if you ever dreamt of your older MacBook using a 10 hour battery…