I just came back from a 4-day trip, and my charge still had 41% battery left after not charging it that whole time. The next day, after charging it fully, it now doesn't last 12 hours. All of a sudden, I can hardly get a full workout without it dying. Tried plugging it in again, and it's not even turning on. This all changed over the course of 2 days. I have changed no settings. It is not in "always" screen mode. It typically lasts almost a week, and now not even a few hours if I am active!
