Smart Watch Universal Charger Magnetic, USB Type-C to Pitch 7.62mm 4 Pin Adapter, Replacement Charging Docks Cable with Anti-Loss Lanyard Compatible for All 4-Pin 7.5mm-8mm Pin-Pitch Smart Watch

For future ease of use, try this USB-C charging adapter from Amazon. It works great with the X3 and I only have to pop it off the cable to connect to my X4.

The X3 charger isn't proprietary, its a generic 4 pin pogo charger you can replace easily USB Type-C to Pitch 7.62mm 4 Pin Adapter

I just bought an adapter from Amazon usbc to pogo plug Smart Watch Universal Charger... https://www.amazon.com/dp/B0FPDCJGJ3?ref=ppx_pop_mob_ap_share Works great.