Hey mate, sorry to hear you are getting worse battery life. Are you using anything from your normal? Check out my guide and see if anything helps. Below are my stats currently. I can only see you still have your alarm on, this can cause a slight lose.
Mine hasn't ever lasted as long as your day and a half, maybe it is just leveling out? A few days ago I recalibrated my battery, maybe that would help?
Sent from my SAMSUNG-SM-G900A using XDA Free mobile app