The new iPhone is camels with their large batteries and the background work that Apple has done to improve its autonomy (read: A13 Bionic: the obsession with energy efficiency at Apple). But some will not be satisfied and will always need more time.
Guilherme Rambo has found in the code for iOS 13.1 three references to the same number of Smart Battery cases for the new iPhone: A2180, A2183 and A2184, which can fit respectively iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max. The presence of these references in an iOS version expected on September 24 does not mean that these accessories will actually come out next week.
Last December, the iOS code revealed battery cases for the iPhone XR, XS / XS Max. It had been a month before Apple decided to commercialize them (read our test).