Kang's battle cruiser was a K't'inga-class Klingon battle cruiser commanded by Captain Kang during the 2290s. It was equipped with concussive charges.
In 2293, Kang's battle cruiser intercepted the USS Excelsior in the Azure Nebula. (VOY: "Flashback")
Kang's battle cruiser may be the Klingon warship, IKS K'Tanco, which was supposedly commanded by Kang, as referenced by Kor in a scene cut from DS9: "The Sword of Kahless".
The Star Trek Customizable Card Game gives its name as the IKS K'elric (a reference to Michael Ansara's Babylon 5 role), while the Decipher role-playing game calls it the HaH'vat and Star Trek: Tactical Assault names it the IKS Va'tal.