The 85W MagSafe 2 power adapter is designed for Macbook Pro with retina desplay.
It Features a magnetic DC connector for more saferty: if someone trip over it, the cord disconnects harmlessly and your MacBook Pro stays put.
An LED located at the head of the DC connector lights up to show the charging status:
- an amber light lets you know that your notebook is charging
- a Green light tells you that you have a full charge.