After almost a day now of having Advanced Calling turned off, the battery held up MUCH better yesterday afternoon and evening. I unplugged it at 100% around noon yesterday, and it lasted until the wee hours of the morning last night - over 12 hours. Recently I've been getting around 6-8 hours given the "overheating", overworked processor, with the EAB Application running WAY too much. Now, using "GSam Battery Monitor", the EAB Application is listed at 0.0%, compared to 12-20%+ often in recent times. So, it seems that the EAB Application was mainly running because of Advanced Calling being turned on, probably doing what I stated in my first post above. My wife, who has the same phone and same Exchange server for email (but about 10% of the # of contacts), wasn't having nearly the battery life problem that I was having. However, both of us still have drastically lower battery life than when we first purchased our phones 1.5 years ago. Back then Motorola advertised 48 hours of battery life! Of course those types of claims are usually a bit of a stretch. However, we could almost always go more than 24 hours. Now given the Android OS upgrades, app upgrades, and the normal degradation of a rechargeable battery, it looks like we won't get more than 12-15 hours even without Advanced Calling turned on. I'm thinking of rooting the phone to give me more control over what is running, while also going with Android 6 (Marshmallow), which Motorola promised for the Droid Turbo, and even still is, but I highly doubt will happen now after so many delays by Verizon.