Apple has released three Smart Battery Cases for the iPhone Xr, Xs, and Xs Max. All are available in black or white and cost $129.
According to Apple, the XR case offers 22 hours of Internet user, 27 hours of video, or 33 hours of phone call time. The iPhone XS case adds up to 21 hours of Internet use, 25 hours of video, or 33 hours of talk time. The XS Max model purportedly gives you 20 hours of Internet, 25 hours of video, and 37 hours of phone talk.