The comment I replied to mentioned "portable batteries" will be required to be "removable/replaceable", which sounds like an oxymoron because the entire point of a portable battery is that it's removable/replaceable.

The proper understanding was that electronics ("appliances") will become required to have portable batteries, because most batteries in them today are not portable.

If I'm still not coming across, let me put it this way: "Portable" in "portable iPhone" is a modifier on "iPhone", it is irrelevant with regards to the iPhone's battery which as of today is decidedly not portable anyway.

If I'm still not coming across: An iPhone being portable does not mean its battery is also portable.

You're coming across just fine. The problem is that you made a sweeping generalization that "I think we can all agree" when it is obvious that we cannot. Your definition does not make sense to me, just as mine does not make sense to you. Neither one matters anyway now that there is a legal definition that must be adhered to.