- Enable Power saving mode to prolong battery life.
Note: To access, swipe down from the Notification bar > tap Settings icon > under SYSTEM, tap Battery > tap Power saving mode. - Set the Brightness to low or automatic.
Note: To access, swipe down from the Notifications bar > tap the Settings icon > under DEVICE, tap Display. - Set the Screen timeout to a shorter duration.
Note: To access, swipe down from the Notifications bar > tap the Settings icon > under DEVICE, tap Display > tap Screen timeout. - Turn off Bluetooth,Wi-Fi and NFC when not in use.
Note: To access, swipe down from the Notification bar > tap Edit. - Turn of Location services.
Note: To access, swipe down from the Notifications bar. - Turn off the Auto-update apps feature in the Play Store.
Note: To access, from the home screen, tap Play Store > tap the Menu icon > tap Settings > tap Auto-update apps. - Disable automatic Sync.
Note: To access, swipe down from the Notification bar > tap Edit. - If you are traveling and do not have access to mobile or Wi-Fi networks, switch to Airplane mode.
Note: To access, press and hold the Power/Lock key. - The maximum talk time for the Samsung Galaxy S4 is 17 hours. The maximum standby time is 15.4 days.
Note: For information about charging your battery, search tutorials for ‘Charge battery.'