The settings screen holds the key to saving battery life on your iPhone so you can use it longer each day. Lets see how.
1. Brightness. Set the brightness setting where you need it. For example, just under half way is usually good indoors. This is a huge power saver on the iPhone.
2. Turn off Bluetooth. The Bluetooth 'radio' uses a lot of power. If you don't use a Bluetooth headset, leave it off. If you do. Turn if off when you don't expect to be using it.
3. Wifi. If you are away from your usual WiFi areas, turn off Wifi. Even if it is only for a short period of time, the battery life saved is worth it.
4. 3G. If you have an iPhone 3G or 3Gs, but you are only using voice calls and email, turn off 3G. This slows web browsing but saves an enormous amount of power! Great if you are just tweeting.
5. Turn off notifications. Notifications are great, but when you need to save power, turn them off. Particularly if you are using 3G, since the drop in network chatter will reduce the load on your battery!
Finally, if that doesn't save enough power, you may need one of these:
Finally, if that doesn't save enough power, you may need one of these:
