Keep your dog's collar powered up with the PetSafe RFA-67 6V Lithium Battery. This 2 pack of batteries is designed for use with PetSafe anti-bark collars and is made from durable plastic. The black colour ensures they'll blend seamlessly with your collar. These batteries are a reliable choice for keeping your pup's collar functioning properly. The lithium material ensures a long-lasting charge, so you won't have to worry about replacing them frequently. Trust PetSafe, a well-known brand in the pet supplies industry, to keep your furry friend safe and happy.