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
Battery for PetSafe RFA-188
Dog Trainer Battery Replacement for PetSafe RFA-188 - 150mAh, 3V, Li-MnO2 - Electropapa