Although proper battery cases for the iPhone 5 are starting to make it to market, Apple's tight control over Lightning connectors continues to force companies to find workaround solutions. iKit's NuCharge for iPhone 5 ($79) is another such case. Like the earliest "supply your own cable" strap-on batteries we tested, it combines a simple plastic shell with a battery that slides onto the back. Here, you get a 1900mAh cell, and iKit claims the engineering…
