PetSafe RFA-188 Replacement Battery at Tractor Supply Co.
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 - Walmart.com
PetSafe RFA-188 3 Volt Replacement Battery Module- Compatible with PetSafe 3V Lithium Battery-Operated Products, White : Amazon.com.au: Pet Supplies
Amazon.com : PetSafe RFA-188 3 Volt Replacement Battery Module - Compatible with PetSafe 3V Lithium Battery-Operated Products for Cats and Dogs - ( RFA 188 ) : Barking Deterrent Collars : Pet Supplies