How Android’s “Doze” Improves Your Battery Life, and How to Tweak It
 

Android 6.0 Marshmallow added a new feature called “Doze” that aims to dramatically improve your battery life. Android phones and tablets will “sleep” when you leave them alone, conserving battery life for later. Doze is designed to get out of your way and just work, but you can tweak it and make it even better.

http://www.howtogeek.com/242563/how-...w-to-tweak-it/