'NCBattery' Adds a Battery Percentage Indicator to Notification Center
If that Status Bar battery percentage just isn't doing it for you, then you may consider adding a massive battery percentage indicator to Notification Center, as shown above.
by iOS developer Marvin Schwalzik, this Notification Center add-on will take up about a finger-sized portion of your Notification Center to display a battery percentage indicator that will display the battery percentage in the center of it with white text. Just like the Status Bar icon, the green progress bar within the battery percentage indicator will illustrate the battery percentage by moving right or left depending on the battery level.
The widget doesn't show up under the "Today" tab of Notification Center like a lot of modern iOS 7 Notification Center add-ons do, but rather, it shows up under the "All" tab of Notification Center, which is dedicated to notifications. This comes off as slightly irregular and strange, and this is something we would definitely like to see changed. But the add-on still shows the battery percentage in Notification Center nonetheless.
NCBattery adds a preferences pane to the Settings application where you can configure whether the battery percentage should display all the time in the battery percentage indicator, or whether the battery percentage should only display when your battery level is below 10%:
You can easily enable or disable the NCBattery widget on demand by dragging it in and out of Notification Center:
If you would like to give NCBattery a try, it's available for free in Cydia's BigBoss repository. It's compatible with both 32-bit and 64-bit iOS devices and will run on iOS 5 and later.
iPhone 5 running iOS 7.0.4