Hello, I want to ask whether some of you ever experience the same problem with me or not.. Earlier this day, my iPad mini was hang. And then I tried to turn it off by pressing the home and power button together. I waited for several minutes and then I turned it on again. But, when I opened the usage tab, I saw that my mini won't display my battery life usage. I tried to turn it off normally and reset settings, but it still won't show. Does any of you know what happened with my mini? And how to fix it? Thank you.