The 45 W Magsafe 2 Current Adapter uses a magnetic CC connector, so that the cable can turn off without danger if someone stumbles and MacBook Air does not fall. It also helps prevent the wear of the cables. In addition, the CC magnetic connector helps connect the laptop plug to a quick and secure connection. When the connection is established, the LED on the head of the CC connector lights up. The amber light indicates that the laptop is charging and the green light warns that the battery is charged. The CA cable is supplied with the adapter to increase the length and the AC power supply (also included) facilitates transportation. Designed with an intelligent design that allows you to curl the CC cable for easier storage, the adapter is a perfect travel companion. This chain adapter loads the lithium polymer battery while the system is turned off, on or in hibernation mode. Also feeds the laptop, if you decide to work without battery. Compatible only with MacBook Air released between 2012 and 2017 with the Magsafe 2 feeding port.