Cool Style-Battery Widget Free is a free Android personalization app developed by NOS Inc. It offers simple battery monitoring and optimization tools that are perfect for beginners. The app displays the remaining battery percentage in a meter display, and users can easily change the design of the widget from five different options.

The app also offers battery-saving features such as configurable brightness settings, Wi-Fi, Bluetooth, and automatic screen rotation. By turning off unused settings, users can prolong the battery life of their smartphones. The app also includes a task killer button that deletes unnecessary memory, lightening the movement of the smartphone and optimizing its performance.

The widget comes in three different sizes (4x1, 2x2, and 1x1), allowing users to customize their home screen layout. Overall, Cool Style-Battery Widget Free is a great option for anyone who wants to dress up their home screen while monitoring and optimizing their battery life.