Sealed lead storage battery

摘要

A sealed lead storage battery including at least one negative electrode plate capable of absorbing oxygen gas generated from a positive electrode plate during recharging thereof, which battery comprises a battery casing having a breathing hole defined therein in communication with the interior of the battery casing, and a safety valve including a flat rubber plate of synthetic material overlaying the breathing hole in contact with the battery casing and an elastic pad made of open-celled elastic material placed over the flat rubber plate so as to urge the flat rubber plate against the battery casing.