You’ve known your iPhone battery is about to run out, but if you want to get more info like how long it can be used for talking, the battery app Battery God should be able to help you.
Battery God is a practical utility app developed by Christopher Roper. Battery God features a detailed setting interface. With the accurate setting options, you can customize the accurate results of your iPhone or iPod touch’s battery life, so you can easily understand how much time you have left for talking on the phone via 3G and 2G, surfing on the Internet through WiFi and 3G, playing games, watching videos and listening to music. Apart from that, its free tips let you know how to get more battery life.
Battery God with a size of 0.5 MB is compatible with iPhone, iPad touch and iPad running iOS 3.1 or later. The iPhone app is available for free at present. If you’re interested, jump to App Store for more details.