This phone has THE WORST battery life of any phone that I've ever had. The battery is a complete failure and renders the phone unusable. Even if I read an email, I can see the battery percent drop almost every minute. I've never seen anything even remotely as bad as this. I wife has an iPhone 6 and we play videos on it for 20-30 minutes at a time, and the battery hardly drops. I haven't tried videos yet on this phone, but I'm guessing I would go from 100-20% in a matter of 15 minutes of screen on time. I've turned off NFC, auto wifi. I have auto brighness on for the screen, and I turned off a few other automatic things. I do NOT have twitter or facebook running in the background. I have to say that I do NOT buy the story that people are using this phone all day with one battery. I doubt it would even make it to the end of an average work day. I think people might be exaggerating if they're claiming regular battery life with this phone. I simply do NOT understand how anyone with this phone is not just utterly disappointed with this pathetic battery. I think I might still be within my return period...I think I might return it due to the battery, and the battery alone. I simply do not understand Samsung's failure here.