In simple terms, this means lighter batteries with increased run times. Replacing batteries not only provides the ability to instantly renew the collar receiver's power supply, it also provides a consistent duration for battery life. Compatible with: IMPI-BARK: IMPI Bark Control Collar, PTPFS-003: Perimeter PCC-200 Comfort Contact Receiver, Pet Stop UltraElite Receiver, Pet Stop Elite SW, and Pet Stop Ultra Elite Series 2 Receiver.