Two cores from your A5 chip deliver as much as two times more power or even more to seven times faster graphics.2 And you’ll have the effects. Fast. iPhone 4S is fast and responsive, that makes all the difference when you’re launching apps, browsing the online world, gaming, and doing almost everything. And no appear you’re doing, you can keep on lighting up. Because the A5 chip is so power-efficient, iPhone 4S has outstanding battery life.