RFA-67 PETSAFE REPLACEMENT COLLAR BATTERIES by High Tech Pet
Amazon.com : PetSafe RFA-67 6 Volt Replacement Batteries - 2 Pack - Compatible with PetSafe 6V Lithium Battery-Operated Pet Products and Specific Dog Receiver Collars - RFA-67D-11, Black : PetSafe : Barking Deterrent Collars : Pet Supplies
Amazon.com : PetSafe 6-Volt Lithium Battery (Pack of 6) : PetSafe : Wireless Pet Fence Products : Pet Supplies