This is a Dakota Lithium LiFePO4 Battery replacement, 12 volts 18Ah, for Hammerhead’s Remora pool vacuum cleaners. The LiFePO4 batteries deliver 2,000 cycles in recommended conditions. Dakota Lithium batteries last so long that the price per use is a fraction of traditional batteries. These batteries deliver 200% more power at 1/2 the weight. They charge 5X faster and last 4X longer than traditional SLA batteries. Plus, the batteries are backed with friendly U.S. Customer/Technical Support and an 11 year “Best Warranty in the industry.” All Dakota Lithium Batteries include Battery Management System (BMS) technology that controls cell balancing, low and high voltage cutoff, short-circuiting, as well as high-temperature protection for increased performance and longer life.