The Apple (85-Watt) MagSafe 2 Power Adapter Wall Charger. White version. Model: (A1424).

Compatible with: MacBook Pro (Retina, 15-inch, Mid 2012 - 2015)

The 85W MagSafe 2 Power Adapter features a magnetic DC connector so if someone should trip over it, the cord disconnects harmlessly and your MacBook Pro stays put safely. It also 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.