I came across a cool free app this weekend called SmartBBattery. The app is simple - it places an icon on your screen that displays you current battery status. The icon changes color (green, yellow or red) depending on your charge, and also shows the remaining battery life as a percentage. Thats all there is to it. SmartBBattery is a no frills app that gets the job done. The app works on all devices running OS4.2 or higher.