A photo of a new, not yet released Smart Battery Case for an iPhone with a square camera bubble – in other words, the iPhone 11 and iPhone 11 Pro – has been discovered by 9to5Mac, buried in the code for the newly released iOS 13.2.
The latest iPhones already have a pretty solid battery life, especially since the phones are thicker, so they can hold larger batteries. A new Smart Battery Case would theoretically improve the battery runtime of the devices.
9to5MacDigging has not revealed how much battery capacity the new housing will have. It is also difficult to say exactly for which iPhone this apparent Smart Case is designed – but Apple has released battery covers for all three 2018 iPhones, so it would make sense for them to come to all three 2019 iPhones.