Yuasa NPX-35FR (same as NPX-L35FR) battery utilizes the latest advance design, Oxygen Recombination Technology, to effectively control the generation of das during normal use; producing the optimum sealed lead acid battery. The Yuasa NPX series is a valve regulated lead-acid batteries, designed for high rate discharge applications. These batteries are used primarily where high wattage is required for a short duration. With 50% more wattage available and a 30% reduction in size over conventional batteries, NPX batteries offer a superior value.