Hey, I've been hovering and reading through these forums since last year and I haven't encountered a problem with my iPhone till now. Yesterday, my iPhone showed the dead battery image, and I got my cable to recharge it via my MacBook Pro. My MBP was on full battery since morning and it was about 4pm when I plugged my phone in. I pulled off the charger for my MBP just before I plugged in my iPhone so I could calibrate my MBP battery. After that, the iPhone lighted up and showed the battery to be more than half charged. It was almost dead just a few seconds ago. Any idea how this happened? Should I be worried?