This is something that I just noticed yesterday and I have never seen it like this before. Yesterday night my standby time since last charge was 17 hours and 35 minutes and my usage was 17 hours 30 minutes. Now yesterday was my day off from work and on my off days I do a lot less on my phone. I only made 4 calls and did no web work. I killed all background apps from running but the usage time kept going up. Today my standby time is 1 hour 54 minutes and the standby time is the same. My only running apps are phone, clock, mail, and calendar. I am running wifi but that always runs. I have not made any calls as of yet today. Anyone else ever see this...any idea why?