Been having a lot of trouble with my iPhone 4's battery life but the phone I have is so perfect every other way, I didn't want to replace it for one issue and risk having another problem pop up. I went to Apple about a week ago and the genius told me they weren't currently doing just battery swaps for the iPhone 4, but they would be very, very soon. I go back today and after 30 minutes of digging around the back, the genius found the battery kit. It took a little longer, he said, because they had to watch a video on how to do it because I was the first ever in this store to have this service done. I walked out of there with my exact same phone and hopefully a better battery. Figured I'd share my story if it helps anyone out. And if this is old news and I'm just behind the times, spare me the flame wars. I just figured since it was the first one to be done in my Apple store, people might not know they have this option.