When you turn on the battery percentage in Android Marshmallow, it displays the numerical value of the battery, inside the batter. So, you will know exactly how much juice you have left instead of just the visual information.
To turn on the battery percentage display in vanilla Android Marshmallow phones like the Nexus 6P, follow these steps:
- Enable the System UI Tuner by long pressing the settings shortcut present in the navigation drawer.
- Go to Android Settings and under System access the new option that says System UI Tuner.
- Tap on the slider right next to the option that says Show embedded battery percentage.
Previously, it was just the visual representation and now you have a number to go along with it. However, the size of the text is so small that you might have to look from a really close distance or enable larger text, which only seems to help you slightly. Right now, take the option as it is and let's hope that it might improve in the future.