Two cores during the A5 chip deliver around two times more power or longer to seven times faster graphics.2 And you’ll notice the effects. Fast. iPhone 4S is quick and responsive, which all the difference when you’re launching apps, browsing the online world, gaming, and doing almost everything. And no challenege show up you’re doing, you can keep on lighting up. Because the A5 chip are so power-efficient, iPhone 4S has outstanding battery life.