Replacement accumulator to Transmitter Dogtra ST50, 200NC, 200NCP, 210NCP, 400NCP, 410NCP, 600NCP, 600M, 610NCP, 620NCP, 1700NCP and to Receiver Dogtra ES400, ES77, ST50, ST100, 500 Series, 200NC, 1700NCP, 1200 Series, 1800 Series, 2000Series, BP805, BP800, STB, RB, ST300, T&B, TBI, 2000 T&B.