Compatible with iOS 3 through 6
Works with iPhone 3Gs, iPhone 4, iPhone 4 verizon, iPad (wifi & 3g), iPad 2 (all variants), iPhone 4s, iPhone 5, iPad mini
BatteryDetective is a very neat iPhone application. BatteryDetective has the ability to test the amount of battery drain that Background Applications are pulling. Not only that, BatteryDetective also allows you to test how much battery different iPhone settings use. Paired with SBSettings (not required) it makes a nice tool to see where your battery life is going! BatteryDetective also provides precise details about your battery realtime, more than you can find anywhere else! Only compatible with iPhone 3Gs, iPhone 4, and iPad
See below for Screenshots