Mr Obama has battled cigarette addiction for years, but told President-elect Benigno Aquino in a phone call that he has now fully quit.
"At some point I attempted some humour, saying 'Mr President, I understand we have the same issue with smoking,'" Mr Aquino said after parliament proclaimed him the official winner of the Philippine elections.
Mr Obama, 48, is sensitive about his smoking habits and has become irritable when questioned about it in the past.
During a routine medical examination in March, doctors confirmed he had not conquered the habit and suggested he "continue smoking cessation efforts". ...