It looks like the new Google's Pixel 4 watch comes with yet another incompatible change in charging technology. This is a ridiculous situation. The original Pixel Watch used one type of wireless charging. Then the Pixel Watch 2 & 3 removed wireless charging and swapped to a different charging mechanism. And now the 4 has changed again. So three different charging cables in under three years.…
I have tried to charge my Samsung watch on all kinds of Qi devices. They don’t work. The newer Samsung phones can charge them, but only because they have a separate set of coils that support watches.