I ended up going with Liwinting 2pcs 2m/6.56Feet DC Extension Cable, 12V DC Power Adapter Plug Extension Cord 5.5mm x 2.1mm Male to Female and it seems to be working fine....

Hi, Have an Archer A9 v6 WiFi router and I am looking for an extension cable that would go between the AC adapter and the router. Does anyone know of such a cable or if the barrel connectors are...