So yesterday, I was using my iphone, full battery had been off charge for about 3hours. I went to go and use it and it was dead. got it to flash up that the battery was dead (I've never even had a iphone lose charge on me ever in the entire time ive owned an iphone). So I charged it up, did the 3.1.2 update and off i went. Today after the phone was off charge for 2hours it flashed up 20% battery remaining, 10mins later 10% 50mins later phone was dead, all i made was a 2min phone call. Couldn't get anywhere near a charger, then randomly 4hours later the apple logo appeared on the phone, the phone started up and it had over half it's battery life. Worked fine for 2hours, then no warning, dead again. Of course apple won't touch it as it's from Australia and im in the UK. So does anyone have any suggestions as to whats going on?