Most of the battery packs of this type I’m seeing, Options here, are wired and connectored. I’m not quite seeing how this one terminates, save that it looks like it might be pin directly to board? Sorry, the pictures are playing tricks on my eyes right now. if it is direct pin-to-board, I’d probably be seeing about contacting the manufacturer of your dog fence devices to see what they can tell you about these parts, as it looks like this battery pack has some built-in circuitry between the battery cell and the PCB that one of our packs might not be able to replace.
