TUTORIALS
https://youtube.com/playlist?list=PLUskUU-NvGqgEzA_dXZHLN8_Ewl9ptXor

TROUBLESHOOTING
https://julietapp.blogspot.com/p/troubleshooting-general.html

This app allows you to configure sound notifications based on battery status.

Features and Benefits

•Persistent service: Background service.
Autostart on boot and after update
•Custom sound notification: You can choose any audio file
•Custom battery percentage
•Text to speech
•Ringtones
•Notification sound repetition
•Sleep mode: Service suspension interval
• Option to ignore the system audio profile (Play sound in silent, vibrate mode)
• Option to disable the service during a call
•Easy to use

Options

•Battery Full
•Battery Low
•Battery Charging
•Battery Discharging
•Battery Plugged
•Battery Unplugged

WARNING: Internet connection required
If the Text-to-speech service does not work, make sure the internet connection is available.

Lite version
https://play.google.com/store/apps/details?id=com.argonremote.batterynotifierlite

Battery Alert, Battery Saver, Battery Alarm, Speaking Battery