2x Pack - Dogtra 300M Element Battery - Replacement for Dogtra BP20R Dog Training Collar Receiver Battery (210mAh, 3.6V, NI-MH) Replacement Dogtra 300M Element Battery Replacement for Dogtra BP20R Dog Training Collar Receiver Batteries Quantity: 2, Lifetime Warranty Capacity: 210mAh, Upstart Battery Brand On Sale for a Limited Time!