We reported that we had experienced poor battery life on the new iPhone 4S and iOS 5 recently, and a few days ago Apple released an update to fix it. For some, myself included, this fix didn’t work!
If you have an iPhone 4 and you find that you never have enough battery power then you need an external battery pack. How about a case with an integrated battery pack? That’s where the juice pack air from mophie comes in.