Amazon.com: Synergy Digital Dog Collar Battery, Works with Dogtra 2300NCP Remote Dog Training sy Dog Collar, (Li-Pol, 7.4V, 500 mAh) Ultra Hi-Capacity, Compatible with Dogtra BP74T2 Battery : Pet Supplies
Intermediate Guide to Dogtra 2300NCP Expandable Essential Pack
Cameron Sino 460mAh Battery BP74R for Dogtra 2300NCP receiver,2300RX,2302NCP,2500B,2500RX,2502B,2502T,3500NCP, 3500RX,3502NCP - AliExpress
Dogtra 2300-NCP Advance 2300NCP receiver 2300RX re Replacement Battery: BatteryClerk.com
Intermediate Guide to Dogtra 2300NCP Expandable Essential Pack
Amazon.com: Synergy Digital Dog Collar Battery, Compatible with Dogtra 2300NCP Transmitter Dog Collar, (Li-Ion, 7.4V, 500 mAh), Replacement for AE Energy AE602048P6H, AE602248P6H Battery : Health & Household
Battery for dogtra collar 2300ncp, 3500ncp (bp74r) - AliExpress