If youre concerned by the battery life of your iPhone there are a few things you can do to help it last longer:

* Run your battery down completely at least once a week and recharge it for at least 5 hours. A lot of people think you dont need to do this because the new iPhone uses a li-ion battery but apple claims it keeps the software calibrated and should result in a noticable improvement in battery life.

* Turn off 3G - making calls using 3G uses up more batter power compared to using EDGE.

* Turn off Bluetooth

* Turn Location Services off.

* Turn off PUSH email and set FETCH to 'less often'.