Those proprietary cables are terrible.

USB (abc, micro etc) are everywhere. Any house, hotel, office, glove box, has some lying around.

But when I forgot my Fitbit charger, I couldn't get one anywhere. The only option was a large electronics store where I could buy an entire new Fitbit. I didn't shove out €200 just to get hold of a charging cable.

The EU should quickly impose rules on waterproof chargers like they did with USB chargers. It will settle worldwide just as fast as the USB enforced standard.

Depending on your Fitbit, it can be charged by a Google Pixel Watch 2 or 3 charging cable.