Separators

Separators are made of woven glass fiber cloth with high heat and oxidation resistance material further offering superior electrolyte absorption and retaining ability, as well as excellent conductivity

Electrolyte

Immobilized dilute sulfuric acid: H2SO4

Container

Case material is ABS, a high-impact proof plastic resin, styrene, or a polypropylene-polyethylene copolymer with resistance to chemicals and flammability

Terminals

Depending on the model, batteries come either with AMP fasten type terminal made of tin-plated brass, post-type terminals of the same composition with threaded nut and bolt hardware, or heavy-duty flag terminals made of lead alloy, a special epoxy used as sealing material surrounding the terminals

Vent Valve

In case of excessive gas pressure build-up inside the battery (usually caused by abnormal charging)the relief valve will open and relieve the pressure. The one-way valve not only ensures that no air gets to the battery where the oxygen would react with the plates causing internal discharge, but also represents as an important safety device in the event of excessive overcharge