Duralock power preserve. Easy to open and store. Powercheck. Our longest lasting. Guaranteed for 10 years in storage. Guarantee: If not completely satisfied with this alkaline battery product, call 1-800-551-2355 (9:00 AM - 5:00 PM EST). Duracell guarantees these batteries against defects in materials and workmanship. Should any device be damaged due to a battery defect, we will repair or replace it at our option. Printed on recycled paperboard. No Mercury added. www.duracell.com. Made in Belgium.