Power droid / Legends Power droids were boxy droids with two or four legs that served as mobile batteries , capable of powering a variety of machinery and vehicles . They were commonly encountered throughout the galaxy due to their versatility . Some models of power droid were colloquially referred to as " gonks , " after the onomatopoeia of their vocalizations . History . Notable power droid models included the EG - 6 power droid produced by Veril Line Systems , the EG - 4 found in Echo Base on Hoth , and the GNK power droid manufactured by Industrial Automaton . A plunk droid served with the Open Circle Fleet during the Clone Wars . After C - 3PO and R2 - D2 were given to Jabba Desilijic Tiure by Luke Skywalker , the droids were taken to EV - 9D9 , who was in the middle of torturing a power droid . Behind the scenes . The first of the power droid appearances is in . In the scene inside the Jawa Sandcrawler , after the capture of R2 - D2 , a power droid can be seen walking around the junk room voicing its trademark " Gonk , Gonk . " A very different - looking droid , used for the vintage Kenner action figure mentioned below , is the next power droid seen . It is visible walking behind Aunt Beru when Luke looks down into their homestead from the crater ' s rim ( when she ' s telling Luke to be sure their next protocol droid can speak Bocce ) . This droid might only be visible on widescreen home versions . The next appearance of a power droid is in the streets of the Mos Eisely Spaceport then in the background of the Death Star ' s hangar bay and hallways . Several power droids can be seen in Echo Base , on the ice planet Hoth in . The droids can be seen walking near Han Solo after returning from his tauntaun patrol . An inverted power droid is seen in the dungeon of Jabba the Hutt . The droid known as 8D8 is in the process of torturing a power droid with the application of a hot branding iron to its feet . In the videogame " " , power droids are used as mobile power generators for powering buildings . In " " and " " , power droids allow the player to replenish their ammunition and supplies . This is achieved by standing in range of the droid and selecting the designated function . In " " , Power Droids appear as a playable character . They are extremely slow , and their only use seems to be climbing steep slopes . They go under the name of Gonk Droid instead of power droid . The power droid ' s debut in figure form came in the second 1978 wave of the Kenner vintage Star Wars line and went on to be released on Empire and Jedi cards . Oddly , the droid paint and detail scheme used for the figure comes from the one owned by Aunt Beru ( mentioned above ) while the figure ' s picture is of the brown droid seen inside the Sandcrawler . So the figure consists of a blue single piece plastic molded body with orange paint detail and a white band , two black ribbed legs ending at silver spray painted feet , a small black rubber antenna towards the rear of the body and a sticker depicting the frontal control panel ' s detail . This figure featured a detail common to R2 - D2 and R5 - D4 in that movement of a body part created a sound effect , in this case , movement of the legs . This sound was created by a two small pieces of white plastic secured inside the body of the droid . When the legs were moved forward and backward together or individually , the snapping of the plastic against the ridged hinges at the top of the legs created a very distinctive hollow clicking sound . There is an interesting packaging variation with this vintage figure . Inside its bubble , to save space , the power droid was packaged with one of its sides against the card and its opposite side against the bubble . The majority of the vintage power droids where packaged with their left side on the card , meaning that the front of the droid faces towards the card image . Some power droids can be found packaged with their right side on the card , meaning that the front of the droid looks away from the card image . Although this difference is a minor variation , of interest to collectors who may wish to obtain both types , there were no major variations made of this figure .