Reliable Lithium Cell Battery: The PetSafe RFA-67 6V Replacement Battery 2-Pack offers long-lasting battery life with a waterproof design for moisture-resistant outdoor use Collar Battery Backup: This precise fit battery is compatible with the PetSafe Wireless Pet Containment System, Stay & Play, Deluxe UltraLight, and Basic Bark Control receiver collars Fence Compatible Battery: This outdoor-friendly battery is compatible with the PetSafe Wireless Pet Containment System, Stay & Play Wireless Fence, Basic In-Ground Fence System, and In-Ground Fence Global Mission, Local Care: With U.S. roots and worldwide reach, PetSafe delivers vet- and trainer-recommended solutions and exceptional customer support to create fields of joy for pets 25 Years of Trust: Since 1998, PetSafe has created safe, innovative, and trusted products that bring joy, enhance pet lives, and support the lifelong bond between pets and their families