RECHARGEABLE BATTERY

A rechargeable battery includes: an electrode assembly including a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode; a case including an opening disposed in one side and receiving the electrode assembly; a cap assembly combined to the opening and closing and sealing the case; a first electrode tab extending from the first electrode and combined to the case; and a second electrode tab extending from the second electrode and combined to the cap assembly, wherein the cap assembly includes a first metal layer contacting the second electrode tab, a second metal layer spaced from the first metal layer and contacting the case, and a first plastic portion insulating between the first metal layer and the second metal layer.