Guarantee: If not completely satisfied with your Duracell battery product, call 1-800-551-2355 (9:00AM – 5:00PM EST). Duracell guarantees its 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. Leaking battery and damaged device must be provided as proof of claim. Duracell may deny claims of damage caused by misuse or modification of the batteries or device.