Everything You Need to Know About Tesla’s New 4680 Battery Cell

So what is the cell tab and how did they eliminate it? I haven't seen any explanation of the tab on the news articles covering battery day. Just a photo of a tab sticking out of a cell. Is it a terminal of the cell?

The volume ratio between the 2170 cell and the new 4680 cell is about 5.48<p>So the new cell is about five and a half times bigger.