300mAh Ni-MH BP12RT Battery DOGTRA Transmitter 175NCP, DOGTRA Transmitter 1900NCP, DOGTRA Transmitter 1902NCP High Quality, high capacity, light weight rechargeable battery No memory effect. Can be charged or discharged as needed without loss of capacity Overcharge protection, with built-in battery life microchip Compatible Models: DOGTRA Transmitter 175NCP, DOGTRA Transmitter 1900NCP, DOGTRA Transmitter 1902NCP Compatible Part #s: BP12RT, GPRHC043M016