Interestingly enough mine seems a bit worse. Had to charge before evening yesterday because for the first time it didn't go all day. I have now installed a battery monitor app which helps me optimize and also kill apps that I'm not using but stay on in the background so I'll be keeping an eye on it, kinda disappointing tho if this is the way its going to be. I love the ONE tho and shall adapt.Hey anymore news about battery life after the update? Thanks!