A rechargeable battery including an electrode assembly including a first electrode and a second electrode, a case that receives the electrode assembly therein, a first terminal electrically connected to the first electrode, a second terminal electrically connected to the second electrode, a cap plate coupled with an opening of the case and electrically connected to the first electrode, the cap plate including a short circuit hole, a short circuit member located in the short circuit hole, the short circuit member being deformable to electrically connect the cap plate to the second terminal, and an upper cover that covers the short circuit hole. The second terminal includes a positioning groove into which a lateral end of the upper cover is insertable, the upper cover being slidably installed with respect to the second terminal.