Abstract: A top case component of a lead-acid monobloc case that comprises a the top case component comprising a top exterior surface of the monobloc case, wherein the top exterior surface comprises: (a) a pocket configured to house a battery monitor circuit, wherein the pocket extends into an interior of the monobloc case past the sealed interface of the top case component and the primary case component; and (b) at least one pathway configured to house electrically conducting connections that place the battery monitor circuit in electrical connection with the positive and negative terminal poles of the monobloc.

Abstract: A battery pressure relief valve has a center stem that extends downwardly through and is secured to a fill tube opening of the battery to securely hold the valve to the battery. A circular top panel is provided on the upper end of the stem. The top panel extends over the fill tube opening. A cylindrical sidewall extends downwardly from the top panel periphery and around the fill tube. The cylindrical sidewall provides a resilient seal around the fill tube that seals the battery interior from the exterior environment of the battery. The sidewall flexes radially outwardly when subjected to fluid pressure from the batter interior, enabling the safe venting of the fluid pressure, and reseals around the fill tube when the pressure is relieved.

Abstract: The construction of an electrically conductive terminal of a lead-acid battery seals a terminal post from the acid in the battery box interior by an collar that is mounted on the exterior of the terminal and that sandwiches a seal between the collar and a plate strap of the battery in the interior of the battery box. The collar is sealed to the battery casing.

Abstract: In one aspect the invention is a lead-acid cell of the type having a container. The container has a jar and a lid. The jar has an upper perimeter defining an opening matingly engaging and closed by the lid. The container houses at least one positive electrode plate, at least one negative electrode plate, a separator interposed between the electrode plates, acid electrolyte absorbed in the electrode plates and separator, and electrical connections from the electrode plate(s) through the container to an output terminal location. The lid is sealed to the jar. The cell is improved by the lid and the jar including a mechanical means for retaining the mating relationship of the lid and with the jar, when the lid is placed upon the upper perimeter, of the jar.

Abstract: A lead-acid cell in which insert molded lead terminal connectors are provided with a surface layer of an elastic adhesive material bonded to the connector and making sealing contact with the enshrouding plastic molding. Electrolyte creepage and corrosion is suppressed.