My iPhone 5 has been getting worse and worse battery life. I just thought I had a faulty jailbreak app, or used it so much that this is why it didn't seem to last, but after using a couple of diagnostic tools it is clear it only holds 77% charge! Obviously I need to get the battery replaced. But I don't want the phone replaced, as it is jailbroken. Advice? Anyone had a battery replaced yet on an iPhone 5?