The Gypsies have agreed terms with the Addicks for the transfer of the 20-year-old centre back which will officially come into effect in January 2013
Feely had been on the radar of a number of clubs including English Premier League side Everton and was on trial with English Championship side Peterborough. However, he has opted to sign for the Addicks.
The 20-year-old centre back will officially become a Charlton Athletic player in January 2013 when the transfer window opens.
Meanwhile, Bohemians have confirmed the signing of left back Ciaran Nangle from UCD. The 22-year-old joins the Dalymount Park club for the 2013 season.
In addition, Bohs have indicated that a host of players have agreed to re-join the club ahead of the forthcoming season, with Ryan McEvoy, Roberto Lopes and Dave Scully among those to commit to the club.