Use the PetSafe 6-Volt Alkaline Battery to power the PetSafe Elite Big Dog Spray Bark Control and Comfort-Fit Big Dog Spray Bark Control collars. The L1325F-style battery supplies power for up to two months and has a five-year shelf life. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Size: 6 VOLT ALK BATTERY. Gender: Male. Age Group: Adult. Type: Bark Control Accessories.