Rechargeable battery

A rechargeable battery comprising:

• an electrode assembly formed by disposing and winding a separator between a first electrode and a second electrode;
• a case facing one of wound ends of the electrode assembly and accommodating the electrode assembly;
• a cap plate facing a second one of the wound ends, and closing and sealing an opening of the case;
• an electrode terminal installed in a terminal hole formed in the cap plate by interposing an insulating sealing material, wherein the electrode terminal has a first part and a second part protruded from an exterior circumference of the first part on at least one side in a thickness direction, wherein the second part contacts the insulating sealing material, wherein the second part of the electrode terminal has a first height that is equal or greater than a first thickness (t1) of the cap plate, and the first part of the electrode terminal is formed as a plate and has a second thickness that is thinner than the first thickness of the cap plate:
• a first lead tab extending from the first electrode;
• and
• a second lead tab extending from the second electrode.