A 6-foot-6 career mugger was convicted of murder in Manhattan yesterday for fatally bludgeoning an 81-year-old man while robbing him in an elevator.

William Hill will face anywhere from 15 years to life in prison when he is sentenced Feb. 11 for the 2006 murder.

His victim, Jacob Gerstle, an esteemed member of Inwood’s Orthodox Jewish community, suffered a brain injury so severe, he lapsed into a coma and died two days after the attack. Hill’s 2008 trial on the same murder ended in a hung jury.