Petsafe 400m PDT20-10646 Battery | Dog Collar Battery – NextBatteries.com
Support & Manuals: 250 m Remote Trainer - PetSafe® Netherlands (Holland)
Support & Manuals: 275m Deluxe Remote Spray Trainer - PetSafe® UK
xunneng Battery for Field Trainer SD 400S, FT 100, PetSafe 250m PDT20 12471, 400m PDT20 10646, PDT00 11234 SRT 100|Replacement Batteries| - AliExpress
Amazon.com: Replacement Battery Part No.DC-16 for Field FT-100, Trainer SD-400S, for PETSAFE 250m PDT20-12471, 400m PDT20-10646 for SPORTDOG SD-400 Transmitter, Dog Collar Battery : Health & Household