Amazon.com : HQRP Battery compatible with Dogtra BP-20R BP20R GP 20AAAAH3BMX 35AAAH3BMX fits 175NCP, 180NCP, 200NCP, 202NCP, 210NCP, NCP-175 NCP-180 NCP-200 NCP-202 NCP-210 Remote Controlled Dog Training Collar Receiver plus Coaster :
Kenwood TK-190, TK-280, TK-290, TK-380 Two Way Radio Battery | Remy Battery
BP-7.2FR: 7.2v rechargeable NiMH battery for FrSky Taranis — Batteries America
Zeee 3S Lipo Battery 1500mAh 11.1V 120C Graphene Battery with XT60 Plu
BP12RT, BP20R Transmitter and Receiver Battery for Dogtra 300M, YS500, SureStim H Plus, 302M, 1900 NCP, 280 NCP, SureStim M Plus Dog Training Collars - Walmart.com