The Battery Tender 3-Bank On-Board Battery Charger is the ideal solution for all your marine battery charging needs. With its rugged construction and advanced features, this charger is designed to keep your batteries in peak condition, ensuring reliable performance and extended battery life. A trio of charging banks allows you to simultaneously charge three 12V batteries. Perfect for boats between 15' and 40', watercraft, and other marine or outdoor applications. Featuring construction that meets the stringent IP67 dust and waterproof standards, this charger is built to withstand harsh outdoor environments. The weatherproof design allows for on-board installation and its rugged, corrosion-resistant housing ensures long-lasting performance, even in the face of saltwater or humidity. This charger also functions as a battery maintainer. Once your batteries reach full charge, it automatically switches to a float mode to prevent overcharging and maintain optimal battery levels. This smart charging process helps prolong battery life and ensures your batteries are always ready for action. Included are three two-in-one alligator clip and ring terminal harness combo cables allowing for easy installation and compatibility with a variety of battery types, including Lithium, AGM and Lead Acid. A user-friendly interface with LED indicators that display the charging status of each bank, allows you to easily monitor the charging progress. With its durable construction, versatile charging capabilities, and weatherproof design, the Battery Tender 3-Bank Battery Charger is a reliable and efficient choice for outdoor enthusiasts. Investing in this charger will keep your batteries charged, maintained, and ready for your next adventure. Available in two, three, and four bank configurations.