Requires Android: 1.5 and up
Overview: Your exact battery level shown in your status bar, with lots of bonus features.
Battery Indicator Pro shows your battery charge level (percent) as an icon in your status bar, with temperature, health, voltage, and time since plugged / unplugged in the notification area. Now has an alarm feature.
Features:

•  Fully configurable green, amber, red, and black icons
•  Icon plugins
•  Estimated charge / discharge time left
•  Battery logging. You can log the battery state (charge, status, voltage, temperature) and browse the logs on the phone or export to CSV.
•  Manually or automatically disable / reenable device lock screen / lockscreen / keyguard
•  Alarms (full, charge above X, charge below X, temperature above X, or health failure)
•  Themes for main window
•  Lots of configurability; most features are optional
•  Very lightweight (please email me if you think otherwise, and I’ll help you figure out what’s wrong — I promise this app will not drain your battery.)
•  Now shows 1% increments even on most Motorola devices (option needs to be enabled on devices that default to 10% increments)
•  Open source

A one-time purchase now gets you free installs and updates for life on all your Android devices (phones, tablets, etc.)
Limitations:
• It’s not possible to replace the built-in battery icon
All requested app permissions are explained on the project website.
* Please see the project website (linked to below) to contact me if you have any questions or problems — I can’t respond to comments left here. *
V5.1.3 update:
What’s in this version:

1. 5.1.2:
2.  Updated Dutch and Turkish translations.
3.  Clarified some help text.
4.  Show percentage sign with Textual charge level feature.
5. 5.1.3:
6.  Fixed error in Brazilian Portuguese translation that was causing a force close.

App Screenshots