Design a 3D model of a battle-worn robot with visible damage and broken components. The robot should have scratches, dents, and exposed wires, with parts of its metal casing cracked or missing. One arm should be partially detached, and sparks or small smoke effects could add to the effect of recent conflict. The robot's face should look weary yet resilient, with a few lights flickering to convey its struggle to keep functioning despite severe damage.