Why battery case doesn't work.
The reason your battery cases are not working is because they are not certified Apple products. I have had the same issue today and after doing some research I found that the iOS 7 upgrade apparently negates the use of any charging product not certified by Apple.
I am absolutely livid. I spent over hundred dollars on a Lenmar case for the iPhone5. It has worked perfectly for over a month. Now Apple decides they don't want Products on the market that they don't have their name on. That's some serious garbage.
This could be the last Apple product I ever buy.
I have used Apple products for almost 30 years. I have always been a fan. This is inexcusable. And exemplifies why so many people view Apple as a company of greed.
Not happy.