Percent Enabler is a simple app developed by an XDA member that lets you add battery percentage on top of your phone’s battery icon. The app works only with Android 4.4, so currently on Nexus 5 only.
Installation is simple. Download the app apk (download link at the bottom of this post) and install it. Click on “Enable Battery Percent” option and reboot the phone.
Note: Even if you can uninstall the App, setting will remain as the app changes a system setting, so to remove the percentage display, just install the App again, uncheck the setting and uninstall it. Also Read: If you want the same feature on any of your Android phone, check this post. You can download Battery Percent from XDA [source]
