Battery life depends on how the battery is used. Note that different devices have different battery life. The expected battery life for your model can be found in the manual.
Be assured below given steps would help you out to solve the issue which you are facing :- 1) Turn off Wi-Fi, GPS, Bluetooth etc and other connectivity features when not using them. 2) Decrease the screen brightness. 3) Close background running apps. 4) Uninstall the unnecessary apps,Long duration of graphics intensive gaming sessions.
If issue still persist please do send the log file via, Samsung member > Get help > Send feedback > Error reports > Select Symptom category. So that we can provide you the better assistance.(Note:-You are requested to send it within 15 minutes of problem occur).
