Warning: the Mophie Juice Pack Air iPhone 4 case turns your otherwise svelte Apple kit into a beast. It’s like going from Kate Moss to Katie Brand, both have their charms but one is substantially heavier than the other. However, there are some really good reasons to give your iPhone 4 a Mophie Juice Pack Air coat for Christmas – not least the added battery life. Here’s our Mophie Juice Pack Air review, weighing up the weight and bulk bother with the extra power it comes packing…
