The next generation of dual-post lead-acid batteries, our revolutionary Advanced Anglers series uses a separator similar to fiberglass to hold the electrolyte in place. This physical bond between the separator fibers, the lead plates and the container completely eliminates leaks and makes these some of the most vibration- and impact-resistant batteries on the market. These completely maintenance-free batteries also serve double duty on the water, serving as either a cranking battery or a deep-cycle power source. In testing, this design lasted through up to 600 drain/charge cycles, giving it a life span far surpassing conventional batteries. Includes one threaded post (wing nuts included). Meets all EPA/OSHA marine requirements. FAA and DOT approved. Manufacturers two-year warranty. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Batteries.