Hi I have had my iPhone 3GS since September 2009 and have recently been noticing that the battery is dying far quicker than it has in the past. For example the other night I had it charged to 100% before i went to sleep at 11.30pm, got up in the morning and with no use overnight, the battery was down to 68%. I made a couple of calls, browsed the internet and 2 hours after I had woken up the battery was down to 25%. I know I am out of warranty, and I am planning to hold out for the iPhone 5 anyway, but do you think that the Genius Bar would be willing to replace my 3GS due to the lack of battery life. I don't want to waste their or my time if it is unlikely they will be able to do anything.