Striker joins development squad.
He has now signed a contract to stay with the U's until the end of this season and he will be looking to get his first goal for the club soon.
In his time with the Jammers, under the management of U's coach David Wright, Femi had scored 12 in 18 appearances.
Femi, who was previously with Millwall, had spent two games on trial with the U's earlier in November after impressing with Maldon & Tiptree so far this season.
Colchester United have signed front man Femi Akinwande to join up with the club's development squad.