Charlton will be in the draw for the second round of the FA Cup on Monday.
Jack Payne struck twice as Charlton eased past Southern Central Premier League Coalville Town 4-1.
Payne and Jayden Stockley put Charlton in charge but part-timers Coalville, who are 91 places below the Addicks in the football pyramid, gave the home side a scare when Ashley Chambers pulled a goal back just after the break.
However, Payne ensured there was no late shock when he made it 3-1 with nine minutes to go and a rasping drive from substitute Chuks Aneke late on wrapped up the victory.
Coalville keeper Paul White had already brilliantly clawed away a Tyreece Campbell shot when he was beaten by a header from the unmarked Payne in the 24th minute.
More slack marking from the non-league side allowed Stockley to make it 2-0 in first-half injury time when he headed home from a Payne corner.