Seems like from 100% - 90% decreases quickly and then it's starts slowing down from there. I get about 3.5 hours with heavy use for 8 hours. Doze really works when the screen goes off, barely any battery used.
I will be returning this before the return policy ends and wait for the better one coming out. For $100 more, we will get the 2.3ghz intel processor instead of the 1.3ghz on this model and 64GB with 4GB RAM. Hopefully it will come out MidAugust.