Though the Galaxy S4's battery is likely sufficient to get you through a normal day of texting, surfing, photo-taking and game playing, there will likely be days when you use it just a bit too much and end up with 10% of your battery life before a big party. Here's what you can do to ensure you have enough battery to get you through the rest of the night.
1. Disable Air Gestures and Any Other Features You're Not Using
The Galaxy S4's eye-tracking feature, air gestures and S Translate are all nice, but if you're not using them, you should disable them. To do so, simply swipe down from the top of the screen to see your notification bar, then tap on the feature's icon to disable it.
2. Enable Power-Saving Mode
If your battery is already running low and it's only the middle of the day, try turning on Power-Saver Mode. You can do so via Quick Settings by swiping down the notification panel and tapping the icon in the upper right of the display.
3. Turn Off Vibration
Like the feel of the vibration against your finger as you press down on the display? Well, if you want to be able to use your phone for hours and hours, you should disable this feature. The vibration eats into your battery like few other features do. To turn off vibration, go to Settings –> Sound–> then uncheck the box next to " Vibrate on Touch."
4. Use a Dark Wallpaper
Bright, white wallpapers use more battery than darker wallpapers. AMOLED displays are especially vulnerable to this because they use Organic Light Emitting Diodes and thus must create their own light instead of using the backlight as LCD displays do. Therefore, dark or black images use NO light, because that's the color these diodes emit when they're turned off. Switching to a darker wallpaper can net you up to THREE HOURS of extra battery life, according to our tests. To switch your wallpaper, simply long press anywhere on your homescreen and choose a new wallpaper from the pop-up menu.
5. Update Your Apps
Often, app developers will send new updates that dramatically improve the efficiency of their apps. Thankfully, it doesn't take any effort at all to ensure your apps are up-to-date. In Google Play 4.0, you can go to Settings ----> Auto-Update Apps. Unless you have an unlimited data plan, choose "Over WiFi Only."