No alkaline battery lasts longer (On average across devices). PowerCheck. Guaranteed for 10 years in storage. 1.5 V. No. 1 most advanced alkaline battery (Based on Hi-Density Core and PowerCheck). Check power level instantly. 10-year guarantee in storage. Duralock power preserve technology. 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. Trusted everywhere. Printed on recycled paperboard. www.duracell.com. www.pg.com. Made in USA of foreign and domestic materials.