Reviewed in Wishlist for Built-In OS Features
Battery Status Indicator along Statusbar: This app displays a thin line (of chosen colour) along the top edge of the screen, varying in length with battery left. There's a neat little charging animation too. If this were to be incorporated into any variant of Android, I imagine that it might look out of place. But, it is a much better visual indicator of battery life than the usual miniscule battery icon in the status bar.
WilliamMRees - Shows a subtle bar at the top most of your screen indicating your battery life. Its always nice to have a quick glance if you're in the middle of doing something.
Adds a configurable Energy Bar at the top of your screen indicating current Battery level. And just when you think, such a simple battery bar can display such a crucial information, try plugging in your charger - you'll be amazed by the details of the animation you'll see. The pulsating animation and the bar together not only indicates the current Battery level but also how much has the Battery charged since you plugged in your charger. Features:-
✓ An interactive UI to configure the Bar live, which reflects your color choice on both the Bar and the UI itself.
✓ Can be aligned left-right-center of the screen.
✓ Multiple colors option - the Bar changes color in every 20% Battery level interval.
✓ Thickness of the Bar can be configured.
✓ Option to start the Bar automatically on phone restart.
✓ Options to keep a shortcut to either hide or configure the Bar instantly from notification panel.
✓ Puts 0% load on CPU when running on Battery, on Battery level changes, system wakes up the Bar momentarily to update.
Feel free to make feature request/suggestion, you will be responded to! :)