The L-shaped battery has retained its shape, but now it is one solid cell, and not two, as it was before. Plus, the battery capacity was confirmed – 3969 mAh.
In addition, the batteries themselves became a little thicker and heavier.
And the last thing that is shown in the video is the slightly redesigned TrueDepth camera system.
So far, it’s difficult to understand something more specific from the video. More details about the changes in all smartphones the other day should tell iFixit. [9to5]