I recently got one off Amazon since my cat ate through the original and I'm not impressed. I haven't gotten a full charge and am orderring a different one and adding this one back.

Asus Zenwatch 3 Charger (3ft/1m), Kissmart Replacement Charger Charging Cradle Dock for Asus Zenwatch 3rd WI503Q Smart Watch https://www.amazon.com/dp/B06WWBQLM6/ref=cm_sw_r_cp_taa_9qtBzbVR9XETR