Replacement batteries for PetSafe in-ground and wireless fence receiver collars and bark collars. Each battery lasts 1-2 months. For PetSafe fence, bark and training collars. See compatibility chart below. Works with PIF-275 models. If this product is not meeting your needs, please contact PetSafe Brand. PetSafe brand has been an industry leading US manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year. Call, chat or email the PetSafe US-based customer care specialists six days a week.