Followed by:
It's the same way they judged their RT battery life, meaning mixed workloads at probably ~200nits brightness. So, no, it won't get 4 hours of 1080p playback and it'll be even less.
Is that better?
I'll wait to see if it really gets the 4 hours, I'd like to see if that number is really true or not. I'm not expecting it to be much better if it is.