iFixit has disassembled Apple’s new iPhone models, which tells us more about the differences with last year’s phones. iFixit shot a live-stream video of the iPhone 11 Pro teardown and wrote a guide for the iPhone 11 Pro Max.
The first major difference is that the batteries in the iPhone 11 Pro and iPhone 11 Pro Max are much larger than the batteries in the iPhone XS and iPhone XS Max.
On the iPhone 11 Pro Max, the device is .4 mm thicker and the screen is .25 mm thinner. As John Gruber expected, dropping 3D Touch from the iPhone lineup makes the screen slightly slimmer. 3D Touch required an additional layer under the display to register pressure on the screen.
That might feel like a tiny difference, but it frees up some space for the battery. The iPhone 11 Pro and iPhone XS have the same single-cell L-shaped design. But the Max version has been updated to use the came single-cell design instead of two cells.
The result is that the iPhone 11 Pro Max now has a 3,969 mAh battery compared to a 3,179 mAh battery in the iPhone XS Max. It represents a nearly 25% year-over-year improvement for the Max battery.
Those hardware refinements combined with a more efficient A13 system-on-a-chip create some significant battery life improvements for the user. Apple claims that the iPhone 11 Pro and iPhone 11 Pro Max last up to 4 hours and 5 hours longer respectively compared to the previous generation.