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 - Amazon.com
Synergy Digital Dog Collar Battery, Compatible with PetSafe RFA-188 Dog Collar, (Li-MnO2, 3V, 150mAh) Ultra High Capacity, Replacement for PetSafe Battery - Walmart.com