Оригинальный сообщение: Jillian ,
The magsafe connector has a small chip inside which is programmed with the magsafe psu serial number and other data including the power rating. If you put a cable from a 60W supply on to an 85w supply it will report it as a 60W supply with the serial number from the old unit. eBay/Ali express replacement cables carry the same problem and have all 0000 serial numbers. same as aftermarket chargers.