Dedicated to the Panasonic Lumix DC-S1 and S1R mirrorless cameras, the DMW-DCC16 DC Coupler is used to replace the internal battery and power the camera using AC power for longer, uninterrupted shooting sessions, specifically when the camera's USB Type-C port is being used. The separately available DMW-AC10 AC Adapter is required for use with this DC coupler.
Works perfectly on the S1H if using the Panasonic branded PSU (sold separately). Other brands are reported to cause specifically the S1H of the S1 series of Panny cameras to generate a battery error message.
So I bought this for my S1 and was planning to attach it to my V mount battery. However this does not have the standard DC power plug, and as far as I can see, there isn't one that exists. They say to use some DC adapter from Panasonic, but Panasonic ships a USB-C power adapter with the camera. Why would I spend $30 on this, and another $100 on another adapter, for something that came with my camera. It makes absolutely no sense. This item it totally useless, DO NOT BUY