A free app for Android, by Green Lines.

Battery Charging Animation 3D is an app that lets you use a 3D animation as you charge your phone. The app also sends notifications or alerts when your battery is full to avoid overcharging. You can choose from any of the themes, such as animals, clouds, food, and many more. You can also use your own images or photos as a background. 

This app provides various charging effects that also display the charging status of your mobile phone, even on the lock screen. Aside from the alluring charging animations, this app also provides a user-friendly interface. You don’t need to open this application manually. It will automatically be initiated once the mobile phone is connected to a charger.