Amazon.com : PetSafe Wireless Pet Containment System Receiver Collar and PetSafe 6 Volt Battery - 2 pack Bundle : PetSafe : Pet Supplies
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