Good Gear Guide
In pictures: Apple MacBook Pro with Retina display...
Due to the new MacBook Pro's slimmer design, Apple has changed its MagSafe port, now called the MagSafe 2. It's not compatible with older chargers, though Apple will sell a seperate adapter ($11.99) if you want to use original MagSafe chargers.
In pictures: Apple MacBook Pro with Retina display unboxing