BP12RT, BP20R Transmitter and Receiver Battery for Dogtra 300M, YS500, 302M, 280 NCP Dog Training Collars Replacement Dogtra 300M, YS500, 302M, 280 NCP 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!