You'll be pleased to know that the design of the Mophie Juice Pack Air hasn't strayed too far from the previous model other than to incorporate the changes to the layout of the iPhone 5. There's a great textured rubbery grip and mesh over the front-facing speakers for an enhanced sound. Most impressive of all, it'll provide an extra 8 hours of talk and internet time, 10 hours of Wi-Fi web and video and a mammoth 40 hours of audio playback.