Chosen Solution

I did this cable repair recently on an apple 85W adapter (not counterfeit, the one that came with the laptop purchased directly from apple) and the system now reports that the connected charger is 60W instead of 85W. Any idea why this would happen?

Download and run Coconut Battery and see what it tells you about the Mag-Safe. http://www.coconut-flavour.com/coconutba

You should buy a 85W cable, it will work. It looks like the 60W cable but different component inside the plug. There is three types of cables: 45W, 60W and 85W. A 45W cable soldered to a 85W charger will charge with only 45W.