Compare Apple 85W MagSafe 2 Power Adapter (MD506LL/A)

Designed for use with the MacBook Pro with Retina Display.A magnetic DC connector ensures your power cable will disconnect if it experiences undue strain and helps prevent fraying or weakening of the cables over time.In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection.When the connection is secure, an LED located at the head of the DC connector will light. An amber light lets you know that your MacBook Pro is charging, while a green light tells you that you have a full charge.An AC cord is provided with the adapter for maximum cord length.The AC wall adapter gives you an even easier and more compact way to travel.Designed to be the perfect traveling companion, the adapter has a clever design which allows the DC cable to be wound neatly around itself for easy cable storage.This power adapter recharges the lithium polymer battery in your laptop while the system is off, on, or in sleep mode. It also powers the system if you choose to operate without a battery