A Nexus 5, running the Android M developer preview, has been pitted against the same phone running Android 5.1.1 to test standby times. Doze and App Standby–two exciting features coming with Android M–are said to double a device’s standby time, giving you a lot more time before you need to put your device on the wire.
In 8 hours of standby time, the Nexus 5 running Android 5.1.1 used 4% of its battery life, while the Nexus 5 running the Android M developer preview used a mere 1.5%. After a full day, the Lollipop equipped smartphone consumed 12% of its battery life, while the Nexus 5 with Android M used a nobler 4.5%. Here’s where things get impressive–in two days, the Nexus 5 on 5.1.1 used 24% and its Android M competitor used a mere 9%.
Google announced Doze at its I/O 2015 developer conference late last month, which will intelligently power down your smartphone over a long period of time, drastically reducing the amount of battery life your smartphone consumes when not in use.
When your smartphone isn’t being charged, App Standby will restrict apps it deems inactive, prohibiting network access, syncing, and other actions.
Keep in mind that these tests were done on Android M Developer Preview 1. The performance of these tests could potentially improve when we see a global launch, as Google is still actively working on improving this new Android version.