I loved my note 4 but the past few months the battery life has been terrible. When my phone battery gets below 30 percent it will shut off like its at zero. I will the plug in the charger and it will start from zero. I just ordered a new battery but my main concern is my android system is eating the most battery. I know it can be a variety of things but I'm not sure what I have in the background that is eating it. I have both my work and personal email sync. Also my Google photo and dropbox upload photos as they're taken. I don't take too many photos though