2x Pack - DC-17 Battery for SportDog SD-400, SD-800, FR200 Dog Training Collars (150mAh, 4.8V, NI-MH) Replacement SportDog SD-400, SD-800, FR200 Battery Replacement for SportDog DC-17 Dog Training Collar Batteries Quantity: 2, Lifetime Warranty Capacity: 150mAh, Upstart Battery Brand On Sale for a Limited Time!