It looks like Apple is moving away from the L-shaped logic board design for the iPhone XI and back to a standard, rectangular one.
The proof is in a few images of the logic board of the iPhone XI from a few different sources.
Logic boards, meant for the iPhone XI
The iPhone X/XS had a stacked L-shaped logic board which pushed the battery to also be L-shaped. With the iPhone XI Apple will move to a rectangular logic board and a large rectangular battery to the side of it.
We expect the iPhone XI and XI Max to have bigger batteries as a result of the new logic board…
