A secondary battery end cap assembly is extruded integrally, is provided on a cap plate and corresponds to a first perforation and a second perforation of the cap plate. The first perforation corresponds to a gas seal part of the end cap assembly and a sid...

In an alkaline dry battery, a sealant comprising grease (7) with a worked penetration of from 175 to 475 is disposed between an opening end of a metal case (1) and a peripheral end of the outer ring portion (5b) of a sealing body (5). This sealant, compris...

A manganese dry battery with excellent leak-proof property is provided, in which electrolyte leakage does not occur even if the size of a positive electrode material mixture is increased to meet a demand for improvement in discharge property. In a sealing ...

An electrochemical cell containing a V-shaped gasket (1) for sealing the cell and preferably the gasket has a compressive preloading on a selected area of the gasket to prevent premature venting of the cell.

A battery in which an electrolytic solution may be prevented from leakage. Within a battery case in the form of a bottomed tube, a positive electrode, a negative electrode and an electrolyte are arranged. An opening in the battery case is sealed by a batte...