Check the listing for details. Petsafe Compatible RFA-188 Replacement 3-Volt Batteries, 5-Pack. Condition: New. Listed at 8.98 USD. [Premium Quality Replacement] Equivalent to PetSafe Model RFA-188 collar batteries. 10-year shelf life. No mercury and Cadmium. [Technical Specs] 3V Lithium Ion Batteries. [Compatibility] 100% compatible with PetSafe RFA-188 batteries; never popping out or falling out from the collars. [Frequency Of Replacement] Battery modules are waterproof and last 1-3 months, depending on use. [Trusted Brand] Made by PET STANDARD for a Better Fit and Better Battery Life PET STANDARD Replacement RFA-188 3V Lithium Batteries Compatible With PetSafe Battery-Operated Cat/Dog Receiver Collars (Pack of 5) PETSTANDARD 5 Packs Replacement 3V Batteries Compatible with PetSafe Model RFA-188 collar batteries. 10-year shelf life. No mercury and Cadmium.