When day came, however, Seleucus was pressing him hard, so he sent one of his officers to the other wing, and partially routed the enemy. But at this point Seleucus himself, quitting his horse, doffing his helmet, and taking a light shield, went to meet the mercenaries of Demetrius, showing them who he was, and exhorting them to come over to him, since they must for some time have been aware that his long forbearance had them in view, and not Demetrius.
Edition :
Plutarch. Plutarch's Lives. with an English Translation by. Bernadotte Perrin. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1920. 9.
Remark :
date: The date is taken from the New Pauly.
http://referenceworks.brillonline.com/entries/brill-s-new-pauly/demetrius-e314200 long-term consequence: Demetrius surrenders after a short flight. This is mentioned in 49.5.