Been looking around on the internet for a small battery pack for the iPhone 5. I had a Mophie Juice pack Air for my iPhone 4S but having used this iPhone 5 with just a bumper for a while i really don't like the idea of going back to the bulky form factor ! The smallest thing i've found so far (which carries a decent charge) is the Power wallet from a company called iBattz, which features a credit card sized battery and compartment and connects via USB to any smartphone. The problem with that of course being that you have to carry a cable as well as the battery. Ideally i'd love if somebody had found something similar to the Juice Pack Reserve from Mophie, but with a slightly larger capacity (700 mAh isnt much use) and lightning cable support. Anybody found this wonder accessory ?