Battery life: Apple iPhone 3GS

Learn how to save battery life on the Apple iPhone 3GS.





Battery saving mode


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Battery saving mode settings


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Tips to save battery life


To save and extend battery life, follow these steps:


Lower screen brightness and timeout duration

To lower the screen brightness, go to Settings > Brightness & Wallpaper and adjust the slider. Alternately, you can select Auto-Brightness to brighten and dim the screen based on your current environment.


Turn off GPS and Portable Wi-Fi Hotspot

All of these features will frequently search for connections in the background while you aren’t using them. To turn these features on and off, go to Settings.


If Wi-Fi is available, use it: Using Wi-Fi not only saves your mobile data usage, it also can be a more power-efficient way to use data instead of using your mobile network.


Change application sync settings

Keeping a constant feed from your social networks and e-mail accounts can cause your phone to be constantly interacting with the mobile network. Reducing the frequency that applications and e-mail accounts update can preserve battery life.


Turn off automatic synchronization and sync your e-mail and calendar manually. To change these settings go to Settings > Mail, Contacts, & Calendars > Fetch New Data, and tap Manually.


Minimize use of third party applications

Using applications can enhance your phones functionality, but they can also use up valuable battery life – especially if they keep your screen on, or require a data connection. Some applications are best used when the device is plugged in.

Note: If you battery life decreases significantly in a short period of time – consider any recent downloads that may have started the problem, and uninstall them.


Toggle from 3G to 2G

Our 3G network gives you faster data, but can also use more battery, especially if the 3G signal is weak. If you aren’t using data, leave your phone on 2G until you need it again. You will still be able to make and receive calls and browse the web at slower speeds while on 2G.


To change this setting, go to General > Cellular > Enable 3G and slide the toggle to Off.


Update to the latest software

Always make sure your device has the latest software version available. Apple will release updates to the device operating system, often improving battery life as one of the benefits.


To check for system updates go to General > Software Updates.


Set device to sleep when unused

Press and then quickly release the Power key to set the screen to sleep mode.