HQRP Battery for PetSafe RFA-67 RFA-67D RFA-67D-11 Replacement 6-Volt 10 pack plus Coaster HQRP&reg; Lithium Battery (10-Pack) plus HQRP&reg; Coaster; Battery Voltage: 6V; Capacity: 225 mAh; 100% compatible with Original Battery; Each lasts 2-6 months, 30 Days warranty!