Amazon.com: Vinnic - A28PX (L1325, 4LR44) 6V Replacement Battery - Single Battery, Bulk Packaging : Health & Household
4LR44 28A A544 Vinnic L1325F Alkaline 6V Battery (5 pack) Dog Collar Replacement - Prime Battery
Vinnic L1325, RFA-18, A28PX, 4LR44, A544, PX28A, 4G13 6V Alkaline Battery for Dog Collars and Barking Control Systems - GN Batteries & Electronics Inc.