A criteria to which people look into before buying a smart phone is battery life. But battery life depends on the apps you use on your phone and how long you use them. It also depends on the apps you allow to run in the background and how much they drain your battery whiles they run at the background.
Due to this, a new feature was introduced into Android Marshmallow called DOZE. This feature aids in the conservation of android battery life by disabling background apps. This feature runs automatically and there isn’t an option whether to turn it on or off. The option that can be found is to remove certain apps from the Doze feature. You can as well set to automatically quit Doze feature when connected to a wireless network.
Its free on playstore. Try it out and give us feedback by commenting below. We will be happy to hear from you.