Nokia battery monitor is a 400kb + application made by the joint venture of Nokia and VVT technical research center in finland that aims to provide more details information about our S60 5th edition and S^3 powered mobile phone's remaining battery life and usage as well as charging time. Its basically offers the similar function that Nokia Energy profiler provides for s60 5th edition phones but in user friendly layout that is easily understandable by average users.
You can change the information that is displayed on the widget by highlighting any one tracking from the estimates tab. In this example, Music playback is highlighted that's why the homescreen widget on the 1st image shows the remaining time when music playback application is continuously used.
Get Nokia battery monitor from Ovi Store.