Hi all, this is probably a silly question, but I was thinking about the gigafactory etc. and I realized I don't really even know what goes into an 18650 (which is terrible because I even remember seeing a video of the battery assembly gizmo machine Tesla uses). I know that they can differ depending on who's making them and probably what the purpose is, but google failed to show me a pie chart or something that says 18650s are x% lithium, x%nickel etc? Can anyone enlighten me or have a good link? Thanks.