SportDOG Receiver Battery Kit For Collar - This Receiver Battery Kit includes everything you need to replace the rechargeable battery in your SR-300 series Collar Receiver. Determine compatibility by checking the model number on your Collar Receiver. SportHunter 1225 (SD-1225), 1825 (SD-1825), 1225X (SD-1225X), 1825X (SD-1825X) WetlandHunter 1825 (SD-1825CAMO), 1825X (SD-1825XCAMO) ProHunter 2525 (SD-2525) HoundHunter 3225 (SD-3225) SportTrainer 1275 (SD-1275/SD-1275E) UplandHunter 1875 (SD-1875) Rechargeable Battery Operating Guide Gasket Hex Key Manufacturer 1yr warranty