[Premium Quality Replacement] Equivalent to PetSafe Model RFA-67 collar batteries. 10-year shelf life. No mercury and Cadmium. [Compatibility] 100% compatible with PetSafe RFA-67 RFA-67D-11 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 [Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you! [Premium Quality Replacement] Equivalent to PetSafe Model RFA-67 collar batteries. 10-year shelf life. No mercury and Cadmium. [Technical Specs] 6V Lithium Metal Batteries. [Compatibility] 100% compatible with PetSafe RFA-67 RFA-67D-11 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 [Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you! Compatible Products: => SportDOG Bark Control Collars - SBC-6 SportDOG Bark Control Collar Receivers - SBC-18 SportDOG Bark Control Collar Receivers => PetSafe Remote Trainers - PDT00-10675 Comfort Fit Big Dog - PDT24-10792 Little Dog System - PDT24-10793 Big Dog System - PDT25-10687 Little Dog System - PDT25-10688 Big Dog System => PetSafe Underground Fence Systems - PUL-275 Ultralight Receivers - PUL-250 Ultralight Receivers - RFRT-300W Radio Fence Plus Shock Collar - PRF-304W Deluxe Radio Fence - MIG00-10938 Deluxe In-Ground System - PIG00-10679 Comfort Fit Standard Collar - PIG00-10680 Comfort Fit Deluxe Collar - PIG19-10764 Deluxe Ultralight Receiver - PIG23-10681 In-Ground Fence Kit - PIG23-10689 Extra Receiver - HIG11-11051 Basic In-Ground => PetSafe Wireless Fence Systems - PIF-300 Instant Wireless Fence - PIF-300-21 Wireless System - PIF-275-19 Instant Wireless Receiver - PIF-275 Wireless Collar - PWF19-10762 Collar => PetSafe Electronic Pet Doors - PPA11-10709 Electronic Smart Door Large - PPA11-10711 Electronic Smart Door Small - PAC11-11045 SmartKey