Charlton earned their first Sky Bet League One win since October 5 as first-half goals from Tyreece Campbell and Miles Leaburn earned a 2-1 victory over Cambridge.
The Addicks had a dream start at The Valley, with Campbell scoring after just 36 seconds. He raced on to a hooked ball forward by Leaburn to fire through the legs of keeper Vicente Reyes.
Charlton extended their lead after 20 minutes, Macaulay Gillesphey flicking on Josh Edwards’ long throw and Leaburn heading past Reyes from close range.
Cambridge pulled a goal back in the 51st minute through Elias Kachunga, a simple close-range tap-in from substitute Liam Bennett’s low cross from the right of the penalty area.
United, who boast the worst away record in the league with just five points from a possible 33, hit the upright through Sullay Kaikai just before the hour mark.
Charlton midfielder Luke Berry, facing his former club, forced two saves out of Reyes after that but Charlton were unable to restore their two-goal cushion.