Hypercapacitor Gizmo

Source
This item drops from Enraged Panther, found in a cage in north-western Thousand Needles. The item will only drop if you have the quest Hypercapacitor Gizmo (quest), and you will need the provided from that quest to open the cage, allowing you to kill the panther. This quest can be obtained from Wizlo Bearingshiner in Whitereach Post in north-western Thousand Needles.

As a quest objective

 * Hypercapacitor Gizmo (quest)