Dogtra 302m Transmitter and Receiver Battery - Replacement for Dogtra BP12RT and BP20R Dog Training Collar Battery Replacement Dogtra 302m Transmitter and Receiver Battery Replacement for Dogtra BP12RT and BP20R Dog Training Collar Batteries Lifetime Warranty Capacity: BP12RT (300mAh), BP20R (210mAh), Upstart Battery Brand On Sale for a Limited Time!