My iPhone 4 would usually make it through an entire work day with a bit to spare. Today I have 2 hours left until my work day is over and my iPhone 5 is at 14% as I write this post. Being that my iPhone 4 is old as hell, I figured I would at least be getting battery life on par with the 4 on my 5. 1. Was this expectation wrong? 2. How can I tell if I maybe have a bad battery?