2x Pack - Tri-Tronics Trashbreaker Ultra XL Battery - Replacement for Tri-Tronics CM-TR103 Dog Training Collar Battery (300mAh, 3.6V, NI-MH) Replacement Tri-Tronics Trashbreaker Ultra XL Battery Replacement for Tri-Tronics CM-TR103 Dog Training Collar Batteries Quantity: 2, Lifetime Warranty Capacity: 300mAh, Upstart Battery Brand, On Sale for a Limited Time! (Does Not Fit G2, G3, LS, Lite, Or Any Collar Made Before 1998)