Amazon.com: Dog Training Collar Receiver Battery Replacement for Dogtra BP12RT - Dogtra 1600 NCP Battery (300mAh, 4.8V, NI-MH) : Pet Supplies
Amazon.com: Synergy Digital Dog Collar Battery, Compatible with Dogtra BP12RT Dog Collar, (Ni-MH, 4.8V, 400 mAh) Ultra High Capacity, Replacement for Dogtra 28AAAM4SMX Battery : Electronics
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Amazon.com: Synergy Digital Dog Collar Battery, Compatible with Dogtra 1900NCP Transmitter Dog Collar Battery Combo-Pack Includes: 2 x SDDC-H1102 Batteries : Electronics