NOVELTY - The rechargeable battery (100) has an electrode assembly with a primary electrode plate, a secondary electrode plate, and a separator arranged between them. The electrode assembly is received in a case (140) which is sealed by a cap plate (150,151). An electrode terminal which is electrically connected to the primary electrode plate has a copper terminal bolt (122) that is electrically connected to a collector plate and passes through cap plate. An aluminum terminal nut (123) is engaged with copper terminal bolt which is coated with nickel coating so as to be riveted.    USE - Low/high capacity rechargeable battery used in small portable electronic devices such as camcorders, cellular phones, as well as for driving motor of hybrid electric vehicle.    ADVANTAGE - The rechargeable battery is provided with a primary electrode bolt having a rivet groove at its top end, so as to firmly fix a primary electrode terminal to a cap plate by engaging aluminum electrode nut to the copper electrode bolt and riveting the top end of the copper electrode bolt. Since the rechargeable battery has a primary electrode terminal with a copper electrode terminal bolt and a primary electrode terminal, the separate welding process is not required for the primary electrode terminal, thus the reliability of the primary electrode terminal is improved. Since the rechargeable battery has a primary electrode terminal with electrode terminal bolt made of copper and terminal nut made of aluminum, the external bus-bar can be easily coupled to the primary electrode terminal. The gasket which is made of an insulating material is arranged between each of the copper terminal bolt and the aluminum terminal bolt and the cap plate, so as to prevent the external moisture from infiltrating into the rechargeable battery and/or prevent the electrolyte solution contained in the rechargeable battery from leaking to the outside of the rechargeable battery.    DESCRIPTION OF DRAWING(S) - The drawing shows the perspective view of the rechargeable battery.    Rechargeable battery (100)    Copper terminal bolt (122)    Aluminum terminal nut (123)    Case (140)    Cap plate (150,151)