The iPhone has one of the brightest screens around, so you’ll want to dial down the brightness if you’re looking to squeeze as much battery life as possible out of your device. And to make sure that the screen doesn’t stay on too long when you turn on your iGadget, be sure to limit the Auto-Lock timeout.
To adjust the Auto-Lock timeout:
Change the wallpaper to black:
The iPhone doesn’t offer haptic feedback, but the device can be set to vibrate when your phone rings and when you receive other types of alerts and communications. Turning off vibrate could save you a bit of juice.
Here’s how to disable Vibrate:
Are you wielding the iPhone 4S? Adjust the setting on Siri that automatically wakes her when you bring the phone to your face. While convenient, this feature can reportedly drain your battery. With the Raise To Speak option disabled, you still have one other way to communicate with Apple’s personal assistant: Simply press and hold the Home button.
How to turn off Raise to Speak:
iCloud is a wonderful service. It seamlessly syncs your information with the cloud, from mail and contacts to bookmarks and photos. However, using iCloud can also burn up your battery. If you’re serious about extending your phone’s endurance, we suggest taking a long, hard look at what you really need to send to Apple’s servers.
For instance, if you don’t regularly create new contacts, calendar events, reminders, bookmarks and notes, toggle some or all of these options off. Here’s how:
The onset of iOS 5 brought changes to Apple’s default iPhone settings, including detection of your time zone. In Apple’s latest mobile OS release, your GPS is repeatedly pinged to check your geographic locale, which can cause battery life to dwindle. Assuming you’re staying put, dig into the settings to disable this option. You can always switch it back on if any travel plans crop up.
Here’s how to do it: