Apple is researching how to build iPhone cases that communicate with the device inside them to show battery level, authenticate you for automatic unlocking, and so much more.
Mockup of battery cases, one with a battery charge indicatorYou’re used to battery cases that show a green or red status light when they’re charging an iPhone. It would be good if we didn’t need these extra batteries, but it would also be handy if we got a bit more information from them, and that’s now what could happen.

