Colloids form a porous SiO2 network structure inside the battery, with numerous tiny gaps that allow oxygen generated from the positive electrode to migrate smoothly to the negative electrode plate, facilitating absorption and synthesis by the negative electrode.

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When the battery is charged, the concentration of sulfuric acid in the electrolyte increases, causing it to "thicken" and accompanied by the formation of cracks. The "electrolysis of water" reaction in the later stage of charging allows the oxygen produced by the positive electrode to be absorbed by the negative electrode through these countless cracks and further reduced to water.

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Thus achieving the sealed cycle reaction of the battery. During discharge, the concentration of sulfuric acid in the electrolyte decreases, causing it to become "diluted".

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It has become the dilute gel state before pouring the battery again.