Even though you don’t use the installed App, the battery is used due to memory operation caused by basic application programs.
The battery life can be reduced, if many programs are running on the standby screen or various additional functions are used.
How to minimize battery consumption
- Settings > Screen > Brightness > 25%
- Settings > Screen > Automatic brightness
- Settings > Screen > Automatic screen off > Within 30 seconds
- Settings > Screen > Cancel automatic screen rotation