All Lifeline deep-cycle batteries are hand-made in the USA. These batteries are Coast Guard approved and have had to pass demanding mil spec requirements as they are onboard numerous US Military vessels. They are designed to deliver industry-leading reserve capacities and life-cycle capabilities. The perfect combination of premium quality materials and perfected proprietary processes have catapulted Lifeline to an industry leader in value and customer satisfaction. All Lifeline deep cycle batteries are backed with an industry-leading 5-year warranty.