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How to give your iPhone's battery life a serious boost

If iOS 5 is killing your battery, tweak these settings to get more juice out of your iPhone 4S.

Apple promised superior battery life on the iPhone 4S and iOS 5, but hundreds of complaints in Apple's forums prove otherwise. iPhone owners are angry about constantly having to plug in their phones, even with light usage.

Apparently Apple is investigating the issue, which one user says is as bad as 12 percent battery drops every 30 minutes, in which case the phone is little better than a brick. Such unacceptable battery performance just begs for the question, "Siri, what the heck is wrong with my iPhone's battery life?"

Luckily, there is an answer. To help you extend your iPhone's battery while Apple builds a fix, we dug around to find the settings and features that drain the battery the most, and (for the most part) don't affect day-to-day usage.

Check out the tweaks in the video below:

Now playing: Watch this: Tips to improve short iPhone battery life

Here's a rundown of the tweaks that will immediately improve your iPhone's battery life:

  • Reset network settings
    General > Reset > Reset Network Settings. Enter a passcode (if you have one) and your phone will restart. No data will be lost, but you'll be asked to re-enter your Wi-Fi passwords.

  • Turn off Location Services
    General > Location Services. Turn off any location services you don't need. Then head to System Services and disable "Location-Based iAds" and "Setting Time Zone."

  • Don't use location-based Reminders
    This useful feature seriously drains the battery, since your phone constantly monitors your location as it waits to activate your reminders.

  • Disable Siri's 'Raise to Speak' (iPhone 4S only)
    Go to General > Siri and turn off "Raise to Speak," a feature that monitors your iPhone's light sensor to activate Siri. Until Apple releases a battery-drain fix, just hold the home button to activate Siri.

If you still don't see improvement after applying these tweaks, check out these battery-saving tips every iPhone owner should know about.