Qty8: 12V, 155Ah, 90lb, size: L=13.5" W=6.8" H=11.3". VMAXTANKS AGM batteries. Tough batteries for tough applications. The heart of the VMAX is the unique physical and chemical structure of its plates. The special treatment and manufacturing process they undergo gains them unique reliability, strength and high performance far exceeding those of other Pb-Ca plates used in similar looking products. Using our specially designed absorbed glass mat (AGM) between the VMAX plates, adds to it many physical and electrical advantages that make it superior to the wet lead acid batteries. This also maximizes the VMAX resistance to shocks and vibrations. Since the electrolyte is totally absorbed by the AGM.