This Sony NP-FW50 dummy battery to 3-pin Fischer cable was designed to be used with (although not exclusively) the Tilta Universal Battery Plate. It allows you to power cameras that use Sony NP-FW50…
Cables
KingMa NP-FW50 Dummy Battery with USB Type-C Power Adapter For Sony ZV-E10 A7M2 A7II A7S2 A7R A7RII A6000 A6300 A6400 A6500
USB Type-C to DC Cable NP-FW50 Dummy Battery Power Adapter for Sony A7RII A6400
ANDYCINE D-tap to FW50 Dummy Battery Cable for Sony A6500 A6400 A6300 A6100 A6000(V2)
TILTA Sony NP-FW50 (A6/A7 Series) Dummy Battery to 5.5/2.5mm DC Male Cable - VideoKing EU Store
Ulanzi NP-FW50 Dummy Battery Adapter
ANDYCINE Dummy Battery Spring Cable DC Coupler for Sony
Ulanzi Np-fw50 Dummy Battery Adapter
tilta Products - Photogear
USB 3.1 Type-C to NP-FW50 Dummy Battery Adapter Cable for Sony A7RII A6400 A6500
ANDYCINE Dummy Battery Spring Cable DC Coupler for Sony
ANDYCINE Dummy Battery Spring Cable DC Coupler for Sony
Floxi NP-FW50 Dummy Battery Adapter for Sony A7II,A7SII,A6000,ETC – S A Camera Land