A:AnswerMophie makes it for both iPhone 7 and 7 plus. You have to read the box when you buy it on the bottom right. It specifically says for iPhone 7 and iPhone 8. Not for iPhone 7 Plus.
A:AnswerYes, I read all the reviews that it didn't fit the 8. I bought the 8 and while I was in the store, the agent put it on the phone no problem.
It works perfect on my 8. Maybe Mophie tweaked it a bit on later issued cases?
A:AnswerNo it will not. In fact the charger is also a different connection from your iphone. making it more difficult, you cant even plug in your earphones while charging either.