SportDOG remote trainer transmitter battery replacement kit Kit includes transmitter battery, rubber gasket, and screwdriver Compatible with SportDOG SD-825 and SD-1225 Built for the Field: SportDOG gear was designed by professionals who demand durable, no-nonsense tools that perform in real-world conditions without fail Trusted by Serious Trainers: Professionals rely on SportDOG for proven performance, consistent control, and expert-backed training guidance that gets results