Vakhtang was born in 1761 into the family of Heraclius II, King of Kakheti (and of Kartli after 1762), and his third wife Darejan née Princess Dadiani. He was a namesake of his late half-brother, Vakhtang (died in 1756), and also bore the second name, Almaskhan. After the death of his brother Levan in 1781, Vakhtang succeeded him to the princely appanage in the mountainous Aragvi valley, for which he codified the criminal and family law (განჩინება ბარისა და მთიურთა ადგილთა, The Regulations for the Lowlands and Highlands) in 1782. In September 1795, Vakhtang fought in his father's ranks against the invading Iranian army of Agha Muhammad Khan at the battle of Krtsanisi in the course of which he commanded the last stand of his highlanders on the approaches of Tbilisi.^[1][2]

After the death of Heraclius in 1798, Vakhtang joined his mother Queen Dowager Darejan and brothers, Iulon, Parnaoz, and Alexander, in opposition to his half-brother, King George XII. The crisis was occasioned by George's renegation on the 1791 testament of Heraclius, requiring the king's successor to pass the throne not to his offspring, but to his eldest brother, thereby making Vakhtang the third in the line of succession, behind George and Iulon. George XII renewed Heraclius's quest for Russian protection and obtained from Tsar Paul I recognition of his son, David, as heir-apparent on 18 April 1799.^[3]

By July 1800, the kingdom faced the prospect of imminent civil war as the rival factions mobilized their loyal forces. Iulon, Vakhtang, and Parnaoz blocked the roads to Tbilisi and attempted to rescue their mother, Queen Dowager Darejan, who had been forced by George XII into confinement at her own palace in Avlabari. The arrival of additional Russian troops under Major-General Vasily Gulyakov in September 1800 in Tbilisi made George XII's position relatively secure, but after his death in December 1800 the Russians prevented his heir David from acceding to the throne and went ahead with the outright annexation of Georgia to the Russian Empire. Vakhtang, who had by that time retired to his residence in Dusheti, in the Aragvi valley, was suspected by the Russians of being responsible of sabotaging the Russian communications and being in touch with his rebellious brother Alexander, who had staged, with his Avar allies, an abortive invasion of the eastern Georgian province of Kakheti in November 1800.^[4]

In July 1802, when the anti-Russian opposition became more vocal in Georgia, the Russians attempted to lure Vakhtang out of Dusheti. Vakhtang escaped from his castle to the mountains of Mtiuleti, but, when the Caucasian Grenadier Regiment under the command of Major-General Sergei Tuchkov advanced into the area, he surrendered on 10 August 1802 to avoid bloodshed. He was brought to Tbilisi and placed under house arrest together with his mother Darejan at the palace of Avlabari.^[5] On 19 February 1803, Vakhtang and his former foe, David, son of George XII, departed under the Russian military escort to St. Petersburg, where he died in 1814 and was interred at the Annunciation Church of the Alexander Nevsky Lavra.^[1] The epitaph in Georgian, commissioned by Vakhtang's widow, laments his having died in a foreign land, not being able to see the motherland.^[6]

During the years in St. Petersburg, Prince Vakhtang wrote on the history and politics of his home country.^[1] His reflections on the social and political issues in Georgia were translated by a Georgian, Igor Chilayev, into Russian and published as Письма царевича Вахтанга Ираклиевича (The Letters of Prince Royal Vakhtang, son of Heraclius) in St. Petersburg in 1812. Vakhtang also authored Обозрение истории грузинскаго народа (Overview of the History of the Georgian Nation), published in St. Petersburg in 1814. A portion of it, translated by the German scholar Julius Klaproth, was published in English as "Sketch of the History of Georgia" in The Asiatic Journal in 1831.^[7]

Vakhtang was married twice. The identity of his first wife, of the Tsulukidze princely family, is not known. He married secondly, in 1784, Princess Mariam (1769 – 27 September 1837), daughter of Prince David Andronikashvili and the Dame of the Imperial Order of Saint Catherine (1810). He had no children.^[8]

• Brosset, Marie-Félicité (1840). "Inscriptions tumulaires géorgiennes de Moscou et de St.-Pétersbourg" [Georgian tombstone inscriptions from Moscow and St. Petersburg]. Mémoires de l'Académie Impériale des Sciences de Saint-Pètersbourg. 6 (in French). 4. St.-Pétersbourg: L'académie Impériale des Sciences: 461–521.
• Gvosdev, Nikolas K. (2000). Imperial policies and perspectives towards Georgia, 1760–1819. New York: Palgrave. ISBN 0312229909.
• Kikodze, Geronti (1945). Ираклий Второй: монография [Heraclius the Second: a monograph] (in Russian). Tbilisi: Zarya Vostoka.
• Lang, David Marshall (1957). The Last Years of the Georgian Monarchy, 1658-1832. New York: Columbia University Press.
• Megrelidze, D. (1979). "ვახტანგ (ალმასხან) ბატონიშვილი [Vakhtang (Almaskhan) Batonishvili]" [Georgian Soviet Encyclopedia]. ქართული საბჭოთა ენცილოპედია (in Georgian). Vol. 4. Tbilisi. p. 337.{{cite encyclopedia}}: CS1 maint: location missing publisher (link)
• Montgomery, Hugh, ed. (1980). Burke's Royal Families of the World, Volume 2. London: Burke's Peerage. ISBN 0850110297.
• Tuchkov, Sergei Alekseyevich (1808). Voyensky, Konstantin Adamovich (ed.). Записки Сергѣя Алексѣевича Тучкова, 1766-1808 [Notes of Sergei Alekseyevich Tuchkov, 1766-1808] (in Russian). St. Petersburg: Svet.
• Vakhtang, Georgian Prince Royal (September–December 1831). "Sketch of the History of Georgia". The Asiatic Journal and Monthly Register for British and Foreign India, China, and Australasia. 6: 228–238.