Two cores within the A5 chip deliver around two times more power or older to seven times faster graphics.2 And you’ll glance at the effects. Fast. iPhone 4S is fast and responsive, making all the difference when you’re launching apps, browsing on the net, gaming, and doing all things. And no matter what you’re doing, you can preserve on carrying it out. Because the A5 chip is indeed so power-efficient, iPhone 4S has outstanding battery life.