2.1mm DC Barrel Jack to 1st Generation MagSafe Adapter

If you’ve ever owned a 1st generation MacBook, you’ll recognize this little friend. The premise of this 2.1mm DC Barrel Jack to 1st Generation MagSafe Adapter is simple. There’s a MagSafe plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other.