PS12-35-D Deep Cycle General Use Battery by PowerStar comes with a 2 Year free replacement warranty and 30 day money back guarantee. Our batteries are assembled with the Highest Quality Cells & Components and always guaranteed to meet or exceed the original equipment manufacturer s specifications. All PowerStar batteries are made to last and always tested in the most rugged environments. Comprehensive testing includes high altitude performance vibration mechanical shock thermal cycling external short circuit and overcharge test simulations. When you’re looking for a battery that is going to last look for PowerStar.