Amazon.com: Synergy Digital Dog Collar Battery, Works with Dogtra 2500 T&B Receiver Dog Collar, (Li-Ion, 7.4V, 500 mAh) Ultra Hi-Capacity, Compatible with AE Energy AE552438P6H, AE Energy - AE562438P6H Battery : Electronics
7.2V 250H Nickel Metal Hydride Rechargeable Battery of 280mAh
7.2V 250H Nickel Metal Hydride Rechargeable Battery of 280mAh
High quality Rechargeable Ni-MH Battery 9V Size 160mAh/200mAh/280mAh Rechargeable Bateria Baterias for E-Toys and MP3/MP4 Player Battery OEM Accepted - China NiMH Batteries and NiMH 9V Battery price | Made-in-China.com