Check for Doze Support App for Android Marshmallow and up ~ 6+

Doze extends battery life by deferring application background CPU and network activity when a device is unused for long periods.

Idle devices in Doze periodically enter a maintenance window, during which apps can complete pending activities (syncs, jobs, etc.). Doze then resumes sleep for a longer period of time, followed by another maintenance window. The platform continues the Doze sleep/maintenance sequence, increasing the length of idle each time, until a maximum of a few hours of sleep time is reached. At all times, a device in Doze remains aware of motion and immediately leaves Doze if motion is detected.

System services (such as telephony) may be preloaded and exempted from Doze by default. Users can also exempt specific applications from Doze in the Settings menu. By default, Doze is disabled in the Android Open Source Project (AOSP). For details on enabling Doze, see Integrating Doze.