Hypercapacitor Gizmo

I am the only survivor from our caravan attack by the centaur! A rare yet mighty panther is guarding my best gizmo, which is around his neck. Hah! Even the centaur tremble in the presence of this ferocious beast! Here is the key to the cage. They took everything there, but left him alone. Slay this beast and bring back my hypercapacitor, and I shall reward you. The wrecked caravan is just north of here.