VINTRONS Ni-MH BATTERY Pack Fits Dogtra Transmitter 2200NCP, Transmitter 1800NC, 1600 Transmitter Capacity: 700mAh / 5.04Wh Type: Ni-MH Volts: 7.2V Size : 45.50 x 30.90 x 20.50mm Certificated with ISO9001, RoHS & CE;