Battery Tools Widget for Android, a simple app for monitoring and optimizing your battery, it provides battery information which allow you to control your power consumption, it comes with two widgets that can be set to your home screen, the widget background can be set to full transparent, the app allows you to display colored battery level on status bar with an option to hide it.
The app also estimates time left for charging or discharging modes, the time is estimated according to your power consumption; therefore, it will keep varying based on current power consumption.
The estimated time will not appear immediately, the app needs some time to monitor your power consumption to be able to estimate the time left.
And now with the latest version, you can enable your own power saving mode and optimize your power consumption with the optimization feature. both features are adjustable from settings
The app displays the following information: