Amazon.com: HQRP Battery Kit Compatible with SportDOG SportHunter 800 SD-800 SD800, 650-058 ST-120 ST120-BCE Remote Dog Training Collar Receiver and Transmitter Sport-Dog : Pet Supplies
Amazon.com: Kastar 170mAh Ni-MH Rechargeable Battery for SportDog FR200, SD-400, SD-800, SAC00-15724, PetSafe Yard and Park Remote Dog Trainer, PDT00-12470 RFA-417 PAC00-12159 FR-200P Collar Receiver plus Coaster : Electronics