Quick update for you all, I went to the Apple store yesterday and they had these cases in stock so I bought one to try in the store and worst case I’d return it right there and then if it didn’t work. It DOES work with the original X, I plugged it in and it recognized right away that a smart battery case was connected, I ended up returning the case about 5 minutes after I tried it though. This new XS Battery case covers 2 microphone holes that are present on the original X entirely (Xs has 3 holes, X has 5 holes) so the mic performance during phone calls is affected, I guess I could use a micro drill and drill 2 additional holes in the case however the case is EXTREMELY bulky and the silicone finish feels extremely cheap and is a dust magnet compared to my apple leather case and I just couldn’t over look these facts so I didn’t end up Keeping the smart battery case. It would have been amazing if they made a leather version and if the case was slimmer because the case is really bulky and I did not like that.