Several months ago, I got a LG Watch Urbane and paired it with my N6. It was a good marriage, but always-on Bluetooth caused a real dip in my N6 battery life. I never could find a solution, until today. It turns out that a big battery killer is the Google Photos app, which syncs to the cloud continuously by default. A simple solution is to allow syncing only when the N6 is charging.

This tip comes courtesy of JR Rafael. You can read his article here:

http://www.computerworld.com/article/3024695/android/android-battery-life.html

So here's to long life!

 

My best guess is that background sync might very well be going on all the time. That is why I quickly switched to sync only when charging.