A few weeks ago I bought a watch, perhaps a smart watch, perhaps a not very smart watch. Anyway this is not really about the watch. The watch had an interesting USB charging port.
The USB "socket" has two plates also surrounded by two magnets.
The USB connector has 2 pins and the pins are surrounded by two magnets. I found it interesting. The magnets meant that the connector would only contact and stick on in the right direction. The socket was completely waterproof. Cool.
A couple of weeks later I got a bone conduction headset. It had the same charging connector.
And apparently the same cable and almost the same connector.
Oh, I realised that the magnets were opposite polarity. Ouch! I carefully marked the cables so as not to get them mixed up. I checked the polarity of the power pins. Same electrical polarity but opposite magnetic poles.
It's annoying that there isn't a standard.
