Originally Posted by
ta_man
Just like with 4MM, some are solid (Losi and ProMatch (sorry)), some are birdcage (Hobbyking).
I use the hobbyking ones for nothing but charging.
You also need it to be real copper. Have seen some made of Brass and they are very high in IR.
We only sell solid real copper 4mm connectors. Makes no sense to try and buy good packs and then increase resistance by using bad connectors.