2005 Dodge Caravan Battery light turns on

I recently got my car fixed at the dealership. It went in for a new alternator. 3 days later it went in for another alternator. 3 days later it went in again because the battery light still comes on , and one day later , even after i picked it up again the battery light came on 24 hours after I picked it up. Some code came on the vehicle 8/80 too. WHat the heck is wrong with it>>>>>