I'm not sure really, since it's my GF's laptop. What I do know is for some time, charger only worked if you bent wire correct way. So she was fiddling and cursing with it every time so it would charge. Even used rubber band to keep wire in connected position. Probably repeated bending is what finished this cable totally.
Of course, it was all happening inside insulation. Insulation and rubber piece from connector, those I removed myself to detect the problem.
Inner one was still intact, that much i know -- bridging worked!. Inner one is hard to break also, it has quite strong plastic insulation tube around it.