iPhone battery case uses case battery then the phones battery?

[iMore Question]

1-Hi, the new Iphone Smart Battery case seems to use the case's battery first then when its low switches to the phones internal battery is that the way it should work? I thought it uses the phones internal then when that battery is low the case battery kicks in to charge the phone.

2-The upper right hand corner of the phone battery icon always shows that the battery is charging with case on is that normal?

 

[BreakingKayfabe]

The answers to your two questions can be answered at the 4:00 mark of this video. It answers in detail.

https://youtu.be/fUPxVX6T1JA?t=240