Save your battery level, because it won’t go beyond 100%.
It is like want to fill a bottle of wine more than its capacity.
The app is already set when it starts and it warns you as soon as the battery level is full.
If you want the battery level less than 100%, pick the percentage you wish with the Select button.
The Ringtones button lets you select a system alarms sound.
With the Our Sound button, you can select your favorite sound file.
Stop button simply stop and close the App.
It’s better off run the app in foreground and use a percentage a bit less 100% when one’s got a new smartphone.