I wanted to post my experience. The iPhone 11 Pro DOES fit into the iPhone XS smart battery case, though very snug. And the power and volume buttons do work. however, the iPhone 11 pro does NOT charge from the case at all nor does it detect it as an "unsupported accessory". Also the ultra wide camera lens is obstructed by the case, however the other two lenses are unblocked. Maybe once the official smart battery cases for the iPhone 11 line are released, this will also be supported. But as of right now it's just a bulky and heavy case
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