Roughly just over a week ago, I've noticed a significant increase in my daily battery drain and cannot figure out why. I unplug about 6am every morning. Up until about 10 days ago, I would have about 70% left when I got home at 6pm. Now I'm getting home with less than 20%. The change was practically overnight, or over the weekend at least. I've tried a fresh install. I've tried removing the Facebook and Google Hangout apps, as I originally suspected them. I turned background app refresh off. Still no joy. I've tried fully draining the battery and recharging. Nada. What I noticed today is that the battery usage section states that Usage time is 9 hours 53 minutes and standby time is 11 hours 29 minutes and it was down to 7%. I'm at work all day and my phone is in my pocket not being used for about 7 hours, so surely my usage time should be at least 6 hours less than the standby time?! I'm sure it was a bigger gap than that before, but sadly no screenshots to evidence the old usage time. Am I right about the usage time thing?!