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•  Open your Android device’s Settings menu and select Wireless & Networks.
• Uncheck the box next to Wi-Fi, and your Wi-Fi antenna will shut down.
• Next, deselect the Bluetooth box to turn off your Bluetooth connection.

• Open your device’s Settings menu and select Wireless & Networks.
• Select “Tethering & Mobile Hotspot.”
• Uncheck USB Tethering and Mobile Wi-Fi Hotspot to turn off both.

2. Turn off location services.

GPS and location services such as Google Maps come in handy when you want to find directions or search for local businesses, but they can also use up lots of juice.

• Open your device’s Settings menu and select Location & Security.
• Uncheck the boxes for Google Location Services and Standalone GPS Services.
• Be sure to also uncheck the box for any proprietary GPS service, such as Verizon’s VZW Location Services.

3. Turn off background data.

Some Web-connected apps, email services such as Gmail and even the Android Market will continuously collect data in the background. Although convenient, this can put a serious strain on your device’s battery.

• Tap Settings and select “Battery & Data Management.”
• Press the Data Delivery tab and deselect Background Data.

4. Switch from 4G to 3G.

Switching from 4G to 3G when not using data-hungry apps or downloading large files can save you serious battery life. Unfortunately, the steps for switching from 4G to 3G differ from device to device and carrier to carrier. Below are the two most common ways to deactivate 4G data on your Android device. Note that if these steps do not work for you, your device may not allow for 4G to 3G switching.

• Tap Wireless & Networks under the Settings menu.
• Select Mobile Networks and press Network Mode.
• Select CDMA Only, and your phone will begin using 3G instead of 4G.

• Tap Wireless & Networks in the Settings menu.
• Uncheck the box next to 4G.

• Tap Wireless & Networks from the Android Settings menu.
• Open the Mobile Network Settings menu.
• Check the box next to “Use only 2G networks.” Note that you will be unable to access data while in 2G mode.

5. Zap haptic feedback.

Haptic feedback gives touchscreen keyboards the sensation of a physical layout through tiny vibrations. While this feature can make typing feel more natural, it can impact battery life.

• Tap Settings and select Sound.
• Tap Vibrate and select Never to turn off the Call Vibration function.
• Scroll down to Feedback and uncheck Haptic Feedback or Vibrate Feedback to disable feedback for soft-touch keys.

 6. Dim that display.

One of the biggest battery hogs on a mobile device is the display. That’s why dialing down the brightness (to a level that’s comfortable) is so important.

• Tap Display from the Settings menu.
• Select Brightness and deselect Automatic Brightness. This will prevent your device from varying the brightness based on the level of ambient light.
• Slide the brightness dimmer to the left until the display is at roughly 30 percent brightness, or whatever level is just bright enough for your needs.

7. Set a shorter screen timeout.

• Select Display from the Settings menu.
• Choose Screen Timeout and select 30 Seconds.

8. Opt for a plain black background.

AMOLED and Super AMOLED displays provide users with deep, rich colors. Naturally, you’ll want to take advantage of that ability by sticking a colorful wallpaper on your home screen. But the truth is, the more colorful your wallpaper, the more battery life it will use. The same goes for Android’s animated live wallpapers. If your battery is on its last legs, you can change your wallpaper to a plain, black background. The less color displayed, the less power used.

• Download and install the No Wallpaper app from the Android market.
• Once the app is installed, tap the Android Settings button from your device’s home screen.
• Select Wallpaper > Live Wallpapers.
• Scroll through the list of wallpapers and choose No Wallpaper. Your home screen will now be completely black.

9. Shut down instant messaging.

Google Talk and other instant-messaging clients can put unnecessary stress on your battery. Compounding that problem is the fact that Google Talk’s default setting automatically signs you into the app when you turn on your phone.

• Open Google Talk and press Android Settings.
• Uncheck the Automatically Sign In box.

• Open Google Talk.
•  Tap the Android Settings button and press Signout.

10. Disable automatic updates for widgets.

Live home screen widgets, such as those that provide automatic news and weather updates, get their information by pinging a corresponding website. Some widgets allow you to disable automatic updates, while others have to be removed entirely.

• Open the widget and press your device’s Settings button.
• From here, you should be able to update frequency. For example, the news and weather widget on the LG Nitro allows users to set the update interval from manual mode to as frequently as every 15 minutes.

• Long-press the widget until it is highlighted.
• Drag the widget to the trash can icon to remove it from the screen.