Battery Widget is an Android utility tool that displays battery status and estimation time. It is developed by JH Jeong and is available as a full version license. The app falls under the category of Utilities & Tools and offers features like notifying the user when the battery is consumed too fast and showing battery status, level, temperature (Celsius and Fahrenheit), voltage, etc.

The app also offers a battery usage history graph, SD card usage (only available in 2x1 widget), customizable color and background, and supports 1x1, 2x1 widget, and notification bar. The main design concept of the app is to consume battery power for monitoring as less as possible, which means the estimation time and graph data are not collected in real-time.

The app also has a lite version that auto-launches when plugged (consider this as a donation), but not every time, only per 3-4 hours. Battery Widget is recommended by Appgovideo.com.

Overall, Battery Widget is a useful and customizable app that provides relevant and accurate battery information to the user.