Sorry if the topic sounds a little confusing. I'm aware the iPhone 4s has less battery life than the iPhone 4 due to the dual core processor, but recently I've noticed the battery life seems to be dying. On a average 30 min trip, I noticed yesterday my phone dropped by around 20% while using it. Today on the same trip with the phone off, I noticed the usage dropped by 15% with the phone in standby mode. I've closed down as many apps as possible, but this seems to be excessive. I had thought I charged my phone last night to 51% at around 11:30pm last night, when I woke up this morning at 7:45am the phone was completely out of battery. I'm not 100% sure on the battery charge last night, but it does seem unusal. Has anyone else experienced simular situations? I'm thinking of taking in my iPhone to the genius bar to possibly get it replaced. I got the phone the week after it was released in Australia which was the same time of the US release.