The Andorian battle cruiser was the principal warship of the Andorian Imperial Guard in the 2150s, a fast and heavily armed design best known through Commander Shran's ship, the Kumari.
Andorian battle cruisers appear throughout Star Trek: Enterprise. They are first seen in Cease Fire, facing Vulcan ships over the disputed planetoid the Andorians call Weytahn, and Shran's Kumari returns in Proving Ground, where it helps Enterprise in the Delphic Expanse while secretly trying to seize a Xindi weapon prototype. In Zero Hour it arrives in time to help destroy the Xindi weapon.
In the fourth season a fleet of the cruisers confronts the Vulcans in Kir'Shara, and the Kumari is lost to a disguised Romulan drone in Babel One, after which Andorian ships join Earth, Vulcan and Tellarite vessels in the hunt for the drone.
The ships are shown as a match for the Vulcan cruisers of the day and considerably stronger than Enterprise itself.