3C Battery Manager

The most complete tool to monitor your battery: Shows historical data (%, mA, mW, mV and temperature), calculates estimated run-times and battery aging, helps calibrate battery, and improves your battery run-time.
★ Display historical data using customized graphics, fully scrolling and zooming.
★ Show battery information in status bar/notification
★ Display battery data on your home screen using widgets
★ Trigger alarm based on battery information
★ Calculate remaining time while unplugged or charging (AC/USB/Wireless)
★ Calculate actual battery capacity
★ Support multiple removable batteries
★ Online help accessible from app
★ Lowest battery consumption on the market
★ Special support for Asus Transformer, Padfone, Inno D6000 and HP dual battery devices.
★ Special edge support for Samsung devices
★ Special root only: Limit battery charging on supported devices (highly experimental, disable+reboot in case of charging issue)
In-app purchase can be made to remove ads and unlock the following features:
★ Show historical data on your home screen using graphical widgets of various sizes (from 2x1 up-to 5x2)
★ Add history markers automatically on boot, plug/ROM/kernel/battery changes
★ Add unlimited number of information in status bar/notifications
★ Update battery capacity or reference based on measured data
★ Show unlimited number of line indicators on top of everything
★ Keep information of unlimited number of batteries
★ Show more battery data using wide (2x1) widgets
★ Add unlimited number of alarms