Galaxy S4: How to Reduce Device Heat and Battery Consumption?
When you close an application using the HOME key and not the back key, the application may still be working and occupying RAM even though you are not currently using the app.
The temperature of your device is related with CPU usage (which at times may require the use of RAM memory) which is affected by running applications.
Turn Off Wireless functions when not in use.
You can use the quick panel menu to toggle Wi-Fi, Bluetooth and GPS on/off, or go into the device settings.
Scroll down to the Notification Bar:
Scroll to the left to turn off:
Note: After downloading and installing 3rd party apps, remove the application from your device if you feel the device is hotter and battery life is more poor than before.
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