And to think people said this was going to be a problem... This battery life is wonderful! This was with relatively heavy usage too. 42mm Space Gray Sport, for those who are wondering. I just hit 13% battery left on the watch, so I suspect I could easily get 2-4 more hours out of it if I tried. Also, I keep it at 100% brightness at all times so if I lowered it that would just increase battery life even more.