TestFreaks posted a review on the Powermat Wireless Charging System for iPhone 4
This system comes as a bundle that will get you up and running without the need for any other Powermat components. The components can also be bought separately but is less expensive sold together. It includes a 1x charging mat and receiver case which is everything needed for protecting and charging an iPhone 4. Unlike its predecessor Powermat has slimmed down the whole bundle with a smaller profile case and narrow single mat.Powermat Wireless Charging System for iPhone 4