For some reason, all my iPad gets ground breaking battery life as iPhone 4S battery life sinks (less than 5 hours). For the past 3 days, I have been using my iPad 3 constantly. Not just web browsing. Because I am trying to catching up few anime, I am constantly streaming anime online. I am seriously impressed by the battery, it seems it will never die. 17 hours if battery life, 7 hours longer than Apple's claim. And this is one and half year old device... Not sure the software counted the time wrong or something, but the battery life is impressive at least on iPad. That leads me to a question: iOS 7 seems not so optimized for iPad and optimized for iPhone. But iPad gets better than ever battery life, yet iPhone battery sucks ball. Why would that happen?