Zantraetium is a mineral indigenous to the planet Andor. Some batteries are composed of zantraetium. However it is not used in Federation starships.

In the year 2382, an Andorian extremist named Threlas ch'Lhren placed an experimental transceiver aboard the USS Enterprise-E in order to infiltrate the ship's computer and later take the ship hostage, as ordered by his superior, Treishya leader Eklanir th'Gahryn. They tried to force the Enterprise to leave the system and abandon Captain Jean-Luc Picard and other crew members. However T'Ryssa Chen found the device in engineering. (TNG - Typhon Pact novel: Paths of Disharmony)