I really enjoy having a great looking home screen with a good balance of colors and very little distraction. But I felt like destroying something beautiful by splashing tons of brightly colored pixels everywhere. The app responsible for this is PowerLine, an on-screen display that uses persistent lines to keep you apprised of almost any live stat you could ever ask for. This comes to us from Urbandroid Team, the developers of Sleep as Android.
I've seen hundreds of battery widgets. Maybe more. Still, I've been using Circle Battery Widget for what seems like eons. It's installed on every device I own/have owned, and it ends up on every device that I test, too. Why? Because it's simple, customizable, and tells me what I want to know at a glance. Not only that, but I think the circular graph is an excellent way to output the remaining battery percent.