A secondary battery for electronic appliance to be installed in an electronic appliance, thereby feeding an electric power to the electronic appliance, is disclosed, which includes: a battery cell (3) in which a positive electrode, a negative electrode and...

A secondary battery including a case having an upper opening and an internal cavity, an electrode assembly disposed within the internal cavity of the case, a cap plate coupled to the case and sealing the upper opening, a collector plate coupled to the elec...

There is provided a lead-acid battery in which the joint state between a lid body and a lid body cover can be checked based on both the joint state between a protruding portion in the periphery of a second exhaust hole and a joining portion of the lid body...