And now back to the body!

A logic board relocation isn't the only easily-recognized layout difference between the iPad Pro and previous iPads. While the iPad Air 2's interior real estate was dominated by a proportionately massive battery, the iPad Pro dedicates a significant amount of room to speaker enclosures.

It appears that the Pro's self-balancing, four-speaker audio comes at the cost of battery capacity. Based on our measurements, the speaker enclosures occupy about half as much space as the battery.

That's space that could have potentially been used for an extra 50% battery capacity. We're sure Apple was very careful setting the balance between battery capacity, weight, and sound quality.