SportDOG Transmitter Battery Kit - Replacement battery kit for the SportHunter 825 (SD-825), 825X (SD-825X) transmitters and 1225 (SD-1225), 1225X (SD-1225X) transmitters. Includes a rechargeable battery, rubber gasket seal, and screwdriver. SportHunter 825 (SD-825), 825X (SD-825X), 1225 (SD-1225), 1225X (SD-1225X) Rechargeable Battery Gasket Screwdriver Operating Guide Manufacturer 1yr warranty