Safely and easily charge your MacBook Pro with the Apple 85W MagSafe Power Adapter. Compatible with 15- and 17-inch MacBook Pro models, the adapter charges your laptop while the system is off, on or in sleep mode. It features a magnetic DC connector that ensures the power cable will disconnect if it experiences strain and helps prevent fraying or weakening of the cables over time. The magnetic DC also helps guide the plug into the system for a quick and secure connection. The versatile power adapter features an AC wall adapter and AC cord for extra length if required.