PowerStar Motorcycle battery PM9-12A All Powerstar Batteries are waranteed to be free from defects for 24 months from date of purchase. 30 day money back gurantee All Powerstar Batteries are waranteed to be free from defects for 24 months from date of purchase. 30 day money back gurantee All Powerstar Batteries are waranteed to be free from defects for 24 months from date of purchase.