A free program for Android, by Mcoder.

The application is designed to be a tool for those who use Android devices and have their batteries charged. This entertaining handy tool reacts when your battery is full, or low, or when the charger is connected or disconnected from the phone. 

You can set different reactions for each event separately. You can also set the audio for each event separately. You can also set the frequency and volume of each audio separately. 

When the charger is connected, the application will make a sound. The application will also make a sound when the battery is full, or low, or the charger is disconnected.