Update: It's not but they sell a $9.99 adapter "The MagSafe to MagSafe 2 Converter allows you to use the MagSafe connector on your LED Cinema Display, Thunderbolt Display, or MagSafe Power Adapter to charge your MagSafe 2-equipped Mac computer."
It looks and I would guess it would be magsafe 1 compatible. Maybe it has extra features or power to it. Pretty much any MB* can be charged on any power adapter albeit slower (or not at all if heavily using it).
It looks and I would guess it would be magsafe 1 compatible. Maybe it has extra features or power to it. Pretty much any MB* can be charged on any power adapter albeit slower (or not at all if heavily using it).