Dogtra BP12RT Battery, for transmitter models: 175NCP, 200NC, 200NCP series, 280NCP series, 300M series, 1500 series, 1700 series, 1900NCP series, 7000M Series, 7100H Series, SureStim M Plus, SureStim H Plus. For receiver models: 1000NC, 1100NC, 1200 series, 1500 series, 1600 series, 1700 series, 1800NC series, 1900NCP series, 2000 series, 2000T&B series, 2200NCP, 7100H series, SureStim H Plus. Also, for the YS500.