Restart your phone. If it doesn't work, go to your phone's Settings > Device Maintenance > Battery. You should be able to see how the apps consume power. Identify those apps and uninstall them. Lastly, if problems still persist, bring your phone to a Samsung Center or something.
PS. When charging using [Fast Charging] chahrgers, its only natural for your phone to get warmer than usual. You can turn Fast Charging off from your phone's settings of you prefer.
The problem is that when you use the phone heats up and not when the shipment and also you reboot the phone and close all applications may not use the sleep period I find him in the morning has lost 20%
