Battery Widget is a free Android app developed by Liutaiyo. It is a cute 1x1 size widget that displays the current battery level with a cute Android character that changes its emotion based on the battery status. The app also allows users to change the size of the widget according to their preference.

To install the widget, users need to long-press on the home screen and select "Tools" from the dialog box. Then, select "Battery Widget!" from the widget list, and it will install on the home screen. The app also has a shopping function that requires an internet connection and allows users to purchase the app through PayPal API, which is approved by PayPal. Users can avail of special discounts on app purchases.

However, the app requires users to initialize PayPal by turning on the internet through 3G or WiFi. The initialization process is not user-friendly, and it takes time to complete. Additionally, the app does not offer any other features or subcategories apart from displaying the battery level.

Overall, Battery Widget is a simple and cute widget that does its job of displaying the battery level. It is ideal for users who prefer a minimalist and cute design for their home screen widgets.

Note: The developer offers customer support for usage, installation, and recommendations.