Jamieson, Fausset and Brown on 2 Chronicles 36:9-10

9-10. Jehoiachin was eight years old--called also Jeconiah or Coniah (Jr 22:24)--"eight" should have been "eighteen," as appears from 2Ki 24:8, and also from the full development of his ungodly principles and habits (see Eze 19:5-7). His reign being of so short duration cannot be considered at variance with the prophetic denunciation against his father (Jr 36:30). But his appointment by the people gave umbrage to Nebuchadnezzar, who, "when the year was expired" (2Ch 36:10)--that is, in the spring when campaigns usually began--came in person against Jerusalem, captured the city, and sent Jehoiachin in chains to Babylon, removing at the same time all the nobles and most skilful artisans, and pillaging all the remaining treasures both of the temple and palace (see on 2Ki 24:8-17).

2Ch 36:11-21. Zedekiah's Reign.