Battery is next. So we address the large ribbon cable traversing its expanse.

Just three screws, and all the same size as before!

(OK I admit, I skipped a lot of detail here. But suffice it to say, the little battery tabs labeled in Chinese were not very helpful. So I just jammed a card under it. I used minimal heat to make it happen.)

Yay! The battery is gone! It was still easier than most of the new Samsungs...