A secondary battery includes an electrode assembly including a first electrode plate, a second electrode plate and a separator, the separator being between the first and second electrode plates, a case accommodating the electrode assembly therein, the case having an opening, and a cap assembly sealing the opening of the case, the cap assembly having a short-circuit hole provided in one area thereof, a first reverse plate and a second reverse plate positioned on a top of the first reverse plate being provided in the short-circuit hole of the cap assembly.