FirstSing FS17088 for 250GB Xbox 360 Slim 45nm . . . . . . AC Power Supply New Power Brick The 360&. . . . . rsquo. s AC power supply unit aka power brick has been revised. The new unit, Model CPA09-010A is smaller and feels a lot less clumsy and not as awkward as the original. The old Xbox 360 and new 360 S power supply are not interchangeable.