Post seal for lead acid batteries

A lead acid battery comprising:

• a cover having at least one aperture formed therethrough, and a collar protruding from said cover which at least partially bounds said aperture;
• a bushing formed to receive a terminal post;
• and,
• a sealing member disposed at least partially between said bushing and said collar, at least one of an interior surface of said collar and an exterior surface of said sealing member being at least partially tapered such that relative movement between said collar and said sealing member causes increasing interferent engagement.

A lead acid battery comprising:

• a cover having at least one aperture formed therethrough;
• a bushing formed to receive a terminal post, said bushing disposed in registration with said aperture;
• an elastomeric sealing member at least partially disposed between said bushing and said cover;
• and,
• a sealing ring joined to said cover, said sealing ring applying compressive force to a first portion of said sealing member to rigidly fix said first portion to said cover.