Apple MagSafe 2 Power Adapter

Apple MagSafe 2 Power Adapters are power supplies introduced in 2012 by Apple for use with MacBook models with MagSafe 2 ports. The adapters are available in various wattages, to support different power requirements of devices.

Overview
The 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.

When the connection is secure, an LED located at the head of the DC connector lights up; an amber light lets you know that your notebook 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, while the AC wall adapter (also provided) 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 while the system is off, on, or in sleep mode. It also powers the system if you choose to operate without a battery.

Supported Macs
MagSafe 2 Power Adapters are interchangeable as long as the adapter can supply the minimum wattage required by the device. Attaching a low-wattage adapter to a high-wattage device can electrically overload the adapter, causing it to fail.
 * MacBook Air (2012 to 2017) — requires 45W or greater
 * MacBook Pro 13" (Retina, 2012 - 2015) — requires 60W or greater
 * MacBook Pro 15" (Retina, 2012 - 2015) — requires at least 85W