If you’ve ever wanted to know how much juice you really have left in your battery, not just the total amount, then myBatteryLife is the application you need.
The app gives you a wealth of information about your iPhone. It shows not only the percentage of remaining battery life, but five other indicators also track talk time, Internet on 3G, Internet on Wi-Fi, and video or audio playback.
The display is what makes the app so simple, yet effective. A large battery icon on the right gives you a visual representation of how much total time you have left, while text on the left provides the more detailed statistics.
The only real problem with this app is that it leaves you wanting more.
I found that myBatteryLife does its job superbly, but there is so much else it could do. What about how much time is left for those only using apps or standby time, for instance? Although many reviewers at the iTunes App Store point out that the information may not always be reliable, I have not experienced that issue.
Most iPhone users will find this utility, from KVapps, extremely useful because it goes well beyond the small power indicator at the top of every phone.