One of the features that Google has implemented inside the Android 4.4 operating system is support for displaying the battery percentage in the status bar, though the feature is still rough around the edges, it seems.
The feature is said to be hidden by default on Nexus 5, though users can easily enable it through an ADB shell command, Android Police reports.
To enable the option, one would need to enter the adb shell content insert:
--uri content://settings/system --bind name:s:status_bar_show_battery_percent --bind value:i:1 adb reboot command.
As soon as the device reboots, the percentage indicator would appear in the status bar, though it will be inside the battery icon, and will sport white digits, which makes it a bit difficult to see.
Those who don’t fancy ADB can enable the feature by using an application coming from the XDA Developers forum.