BATTERY LIFE / How to keep a bit of fuel in the tank - iPhone

  Disable Location Services to save a bit of juice if your iPhone is running low.

Global Positioning System (GPS) and 3G are great iPhone features. GPS enables you to pinpoint exactly where you are on the planet, as well as get directions, find restaurants and so on. 3G gives you a faster data connection to load web pages, maps, email and other data-reliant services. However, these two features also go a long way towards sapping your battery life.

If you're going to be in an area with no 3G coverage, then you might as well switch it off. This is hidden away in Settings > General > Network. As well as preserving the battery, this often helps establish a data connection -albeit EDGE or GPRS only in low 3G areas. Secondly, disabling Location Services (Settings > General > Location Services) will save a bit of juice, since GPS won't run in the background when using the Camera app (and other apps that use your location).

You can also turn off Push mail. Do this by going to Settings > Mail > Fetch New Data and turning Push off or switching Fetch to Manually. Disabling Wi-Fi will also preserve your battery life, as will switching off Bluetooth and setting the brightness of the iPhone screen to its lowest level.

If you find yourself out of charge on the move, the iPhone can be charged from any powered USB port. This means that even if
you're without a computer, as long as you have the USB-to-dock connector lead, you can charge from such devices as a PlayStation 3 or Nintendo Wii (or other devices with a powered USB port).




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