Barnsley have earned a vital victory at The Valley thanks to a second-half strike from Tomasz Cywka.
The Polish midfielder buried the ball in the top corner from an acute angle to break the deadlock early in the second half.
© PA Photos
The Addicks were forced to search for an equaliser with 10 men in the closing stages when Ricardo Fuller pulled up with a hamstring problem after Chris Powell had used all three substitutes.
Barnsley held on for all three points to leave the home side languishing in the relegation zone.