Use APKPure App
Get Fullscreen Battery Indicator old version APK for Android
장치가 연결된 경우 전체 화면 배터리 표시기
TUTORIALS
https://youtube.com/playlist?list=PLUskUU-NvGqjnChNn1dGc3QvkKSICgg6F
TROUBLESHOOTING
https://julietapp.blogspot.com/p/troubleshooting-general.html
How to uninstall
Device administration must be disabled before uninstalling.
Just disable the "Auto screen lock" option.
This app shows a fullscreen battery indicator when the device is connected.
Features and Benefits
• Persistent service: Background service
Autostart on boot and after update
• Custom color
• Auto screen lock
• Easy to use