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Those are some good examples, more of that please. Most of the lithium powered devices I'm using currently are power tools and they are exclusively repackaged 18650 and 21700 cells. It's really not much of a technical challenge to make these things standardised but if there is no regulatory pressure it's easy money for the OEMs and more toxic waste for us.
ENG has even standardized on a DIN plug for power delivery since forever as well; anything from camcorders to monitors or studio cameras uses a DIN plug for external power. Cathode Ray Dude goes over this stuff quite a bit in some of his earlier vids.