We've reached the source of power. Here are the runes on the black box:

3.75 V, 24.3 Whr, 6471 mAh—a huge bump over the 16.3 Whr battery seen in the previous Mini. It seems we've found the source of the Retina's thicker skin.

In spite of those specs, Apple still pegs the battery life at 10 hours. We suspect the extra juice is being funneled into the swanky new display.

To fight the dark magics (well, adhesives) binding this battery, we call upon the awesome powers of the iOpener once more.