The grid is made of Pb-Ca alloy, and the lead paste is a mixture of lead oxide and sulfuric acid. Electrolyte: A high purity sulfuric acid solution, which is a reactant in the battery's main reaction and the conducting ions for electricity. The construction characteristics of the recombination type lead-acid electric accumulators (valve-regulated hermetic accumulators); the absence of acid fumes and. A lead-acid battery has three main parts: the negative electrode (anode) made of lead, the positive electrode (cathode) made of lead dioxide, and an electrolyte of aqueous sulfuric acid. The. The DataSafe® HX range of Valve Regulated Lead Acid (VRLA) batteries has been designed to offer superior solutions for Uninterruptible Power Supply (UPS) markets. In most cases, you will mount or weld various panels on the structure.