Nexus 5 running Android M showing 2.7x greater standby time than one running Lollipop
One of the major improvements found in Android M and highlighted during Google’s I/O developer conference was two new features meant to significantly increase standby times of smartphones running the OS over previous versions, and now we have some more numbers that should make the differences concrete.
For the uninitiated, the two new features meant to tackle battery life are Doze and App Standby. Doze uses what Google calls “significant” motion detection to determine when a device has been left unattended for an extended period of time, and when it does find that your device is idle, backs off background activity (like apps syncing data) to go into a deeper state of sleep and drink less power in standby.