AGM (Absorbed Glass Matt) batteries are different from flooded lead acid because the acid (electrolyte) is held in the sponge-like AGM separators. The separators are woven into mat to increase the active surface area and hold the electrolyte on the cells. AGM battery Deep plates can be flat or rolled and as there is no free flooding of acid, they can operate in any position and can last substantially longer Cycle than conventional cycling.