Circle Battery Widget is a free Android application developed by Cédric Depoortère under the Utilities & Tools category. It is a simple little widget that displays the remaining battery percentage in the form of a circle. It is available in different sizes, including 1x1, 2x1, 1x2, 2x2, 3x3, and 4x4, making it useful for both smartphones and tablets.

To use the widget, it must be added manually before launching the application. You can customize the widget by launching the application via the Launcher or by clicking on the widget. It is important to note that if you use a task killer, you must add the application to the exception list to ensure the widget works properly.

Overall, Circle Battery Widget is a great tool for those who want a simple and customizable way to display their battery percentage. If you enjoy using the widget, you can support the developer by purchasing the "Donate" version.