Several complaints on Apple message boards say that the iPhone 4S battery drains too quickly and makeshift fixes don't seem to solve the problem. But is this a repeat of last year's iPhone "death grip"?
Reset network settingsGeneral > 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 ServicesGeneral > 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 RemindersThis 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.