That’s because one Reddit user has modified the old version of case for iPhone 7. So, that it would fit the size of the iPhone X. And to make the first test, the workaround worked perfectly .
In addition, iOS recognized the presence of the accessory even showing an icon that shows the case in operation and the amount of battery it still has.
User Rationalspace787 even posted an account of how he made the old accessory work on a more current model:
So recently I received an iPhone 7 Battery case that is heavily destroyed. So I decided to hack it in an attempt to make a version for iPhone X. I cut all the sides and I sank the bottom so that the X would fit in it. The phone works with the case and I’ve made an interesting discovery. IOS 12.1.2 already has the icon for an iPhone X-style battery case.
For now, despite the discovery and the rumors, Apple did not want to officially speak on the subject. Anyway, the chances of seeing the release of a new edition of the case grow even more with the experiment of the user. Now all we have to do is wait and see when this will happen.
The Apple iPhone X is available in NoteTec for $ 4,599 and Kabum for $ 4,999. The cost-benefit is average but this is the best model in this price range.