ArtisanPower offers a comprehensive warranty on all our batteries. We guarantee that our batteries will meet or exceed the performance of any other battery with the same specifications on all counts of durability, structure and fit. All of our batteries carry a 12 month, full repair or replacement warranty for any manufacturing defects. Our batteries are also guaranteed to maintain 80% of their rated capacity for a period of 12 months from the date of shipment under normal use.