Engineered with an optimized plate design, PowerSafe OPzV valve regulated lead acid batteries have an increased capacity that exceeds the DIN standard. Additionally, the die cast tubular plate design offers excellent cycling with a proven long life under float conditions. The pasted negative flat plate design provides the perfect balance for maximum performance. The robust design and use of a gel suspended electrolyte makes them virtually maintenance free. They have a wide range of capacity; feature die cast tubular positive plates, special micro porous separator materials, a pressure relief valve and color coded terminals.