A rectenna is a type of antenna used to convert used to convert electromagnetic energy into a direct current of electricity. there were several backup rectenna and main rectenna used to power the Droid Control Ships used by the Confederacy of Independent Systems during the Clone Wars and The Battle of Naboo, as well as the Separatist Crisis.
- Star Wars: Episode I The Phantom Menace (partially, control bridge tower during the First Battle of Geonosis)
- Star Wars: Episode II Attack of the Clones (briefly, during the Battle of Coruscant)
- Star Wars: Episode III Revenge of the Sith
- The Clone Wars: Ambush
- Etc... I cant be bothered to write them all down