Please check the mentioned troubleshooting steps for battery draining problem:
1. Turn off GPS, Bluetooth, hot spot, Wi-Fi and Auto-sync when not in use.
2. Turn on auto-brightness adjust, set auto screen off less than 30 seconds.
3. Clear background Apps, tasks and clear caches regularly in phone manager.
4. Limit the App self-starting in phone manager-Privacy Permissions-Start-up Manager-choose the App you want to limit.
5. Not receive the useless notification in Setting-Notification and Status Bar-Manage Notifications.
6. Use the phone under good Internet conditions.
7. Open power save mode in setting-Battery-Power saving or Smart Power Saver.
We hope this will help you. Further, if the issue persists we recommend you to visit nearby Service Centre for a quick physical inspection.
