[_stephan]

The battery comparison with the 2015 MacBook Pro is not really fair, because he turns the brightness "all the way" up for his benchmark, even though the new models have screens with 500 nits brightness while the 2015 model only has 300 nits.

[geerlingguy]

I'm less concerned with the 2015 -> 2016 battery life regression (general use with auto brightness bears this out as well, so the delta is there, it just might not be as great), and more concerned with the fact that the Function Key Pro gets 10% better battery life.