With this app, you'll know your device's battery state.
The app tells you the estimation hours and minutes for :
- stand by
- talk time (non available for the iPod Touch)
- web browsing on 2G/3G and Wifi
- audio playback
- video playback
A charging indicator is also available.
The informations update every 5% of the battery life (due to a limitation of Apple).
Download this useful tool :)