This app has been rendered useless to me now that I have an iPhone 4 and can display charge percent in the status bar (I bought it for a 3rd-generation iPod touch). I dont find the time estimates especially accurate, though a lot of that probably has to do with multitasking versus not. Also, it has one of the most godawful ugly interfaces that I have ever seen. That being said, it works fine for charging maintenance, if you can stomach the insanely-busy circus interface.
nashwaak about Battery LED Pro, v4.0.1