@woozle Core Resestense : 3.5 ohm Shield Resestense : 2.0 ohm

@woozle I'm not using solder, I'm using regular electric Tape to link the DC plug connector and making something like knots. Does that affect?

@woozle This is what I get when I measure it at the end of each one (red and black) Red : . . . Black :

@woozle Actually Im planning to buy a UPS and extend its Cable so I'm checking it on adapter first. This what i have about cable :

@woozle Does that mean it's very hard to extend the cable over 20 meter?

@woozle Actually I think I was checking the voltage wrongly, I tried again, when I check the voltage at the end of the cable it shows 9.2V without plugging it to the router. And when I check it near...