Android's Best Battery Indicator
BatteryBot (formerly Battery Indicator) is the original battery indicator app for Android™, released in 2009. Both the free and the Pro versions have maintained a 4.5+ star rating in Google Play™ from the beginning.
By default BatteryBot displays your exact battery percentage in the status bar with detailed battery information in the notification tray. This can be disabled if you like. There are also desktop widgets included.
For a full list of features and many screenshots, please see the listings in Google Play:
Try the free version:
Go for Pro:
BatteryBot is an open source project. Source code is available from the project website.