ACDelco Gold (Professional Voyager), premium aftermarket AGM 18 Month batteries have high cycling capabilities and are remarkably charge-receptive. The Absorbed Glass Mat design is 100% leak and spill proof because the Electrolyte is permanently held in the glass mat separator instead of free flowing within each cell. Oxygen recombination reduces water loss and reassures maintenance-free performance. Engineered with heavier, thicker plates ACDelco Gold (Professional Voyager) AGM 18 Month batteries can withstand the potential damage of continual deep discharging and recharging. Both positive and negative grids are built with lead-calcium alloy to maximize corrosion resistance, optimize cycle life and reduce water consumption for battery durability. ACDelco Gold (Professional Voyager) AGM 18 Month batteries also include quick-glance charge monitoring. These premium aftermarket AGM batteries are manufactured to meet your expectations for fit, form, and function. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.