Mighty Max Battery ML4-6 - 6 Volt 4.5 AH, F1 Terminal, Rechargeable SLA AGM Battery
Enerpe RFA-67 RFA-67D-11 6V Replacement Battery Long-Lasting & High Capacity Compatible with PetSafe Electronic Collars Pack of 6
Duracell Coppertop 6V 908 Alkaline Lantern Battery with Spring Terminals, 1 Count Pack, 6-Volt Battery with Long-lasting Power for Household and Office Devices
GoodBoy Bark Collar Batteries 5-Pack 6V Alkaline Battery 4LR44 (Also Known as PX28A, A544, K28A, V34PX)