The gGO 650 mAh battery is covered under a complimentary 90 Warranty. This warranty covers manufacturer defect or failure for a period of 90 days from the date of purchase. Coverage includes replacement or repair of the product, which is determined by availability, or vendor, and the time of purchase. A replacement may be made within 90 days after purchase with the same product or like product when direct replacement is unavailable. Please see our Ganesh Cares page for information on warranty procedures and how to submit a claim.