Bests & Worsts Reviews from Amazon

I had to send back to of these units before learning the Mophie cases offered here are knock offs. My problem with both was that the soft aluminum around the sides where the USB port is located is very weak and will form hairline cracks causing it to not charge after couple weeks of use. I couldn't understand why these cases were so highly rated and I was having so much trouble. But after reading dozens of reviews I read where someone suggested that these cases were knockoffs and gave it indicators as to how to know for sure. After ordering my third one from Mophie.com, I now can concur with his analysis. The review that I read had a whole list of ways to know the difference but the two main points that I found were these: 1. A genuine Mophie case will come fully charged. 2. The USB cable that comes with the charger will have the Mophie logo on it. I am now convinced I own the best chargeable iPhone case available.