So, my iPad 2has had the annoying ! on the settings tab for a few weeks now as it's desperate to upgrade me to iOS 6. The thing is my iPad works fine and the battery life is great - as far as I can tell if I allow this upgrade i'll probably end up halving my battery life from the scare stories I've heard. Is this still the case? Just scaremongering or reality? If so is there any way to turn off the upgrade notification?