What is the thick line on the Apple notebook for?

The thick line with Apple's notebook is the power extension cord. Pull out the two plugs of the power supply and plug in this cord, which can play an extension role. However, the plug is American standard and needs to be transferred to domestic use.

If the power cord is not long enough to connect the power extension cord, you can buy a conversion plug and connect it again. The replacement method is to unplug the connector of the original charger and then plug in the power cord.

Extended data

The thick magnetic ring in the middle of the thick line of Apple notebook charging cable is used to choke, shield and reduce attenuation. The magnetic ring on the power cord is a magnetic ring to prevent electromagnetic radiation, not for people, but for the electromagnetic interference caused by wire filtering on the notebook.

Apple's laptop charger adopts the design that the charging cable can be separated from the charger. In order to get the best charging experience, you should use the USB-C charging cable that comes with your Mac laptop. If the USB-C charging cable with high wattage is used, the Mac can still be charged normally, but the charging speed will not increase.

USB-C charging cables with rated power of 29W or 30W can be used with any USB-C power adapter, but when connected to a power adapter larger than 30W (such as 6 1WUSB-C power adapter), these charging cables will not provide enough power.