smavco Bundle DC-20 Battery for Dogtra 210NCP, 202NCP Gold - 2, YS-200, YS-500, YS-500 Yapper Dog Collar Plus Micro USB Cable, 210mAh Volts: 3.6V Type: Ni-MH Capacity: 210mAh Dimension: 29.37 x 25.67 x 9.03mm Compatible Part nos: 20AAAAH3BMX, 3SN-2/3AAAA20H-S-AX1, BP20R, DC-20 Compatible Models: Dogtra 210NCP, 202NCP Gold - 2, YS-200, YS-500, YS-500 Yapper Dog Collar