A secondary battery includes an electrode assembly having a first electrode, a second electrode, and a separator located between the first electrode and the second electrode; a first collector plate electrically coupled to the first electrode; a case housing the electrode assembly and the first collector plate and having an opening; a cap assembly sealing the opening of the case and being electrically coupled to the first collector plate; a first electrode terminal comprising a first electrode terminal plate electrically coupled to the cap assembly; and a second electrode terminal protruding through the cap assembly, electrically coupled to the second electrode and electrically insulated from the cap assembly.