Amazon.com: Synergy Digital Replacement Battery, Works with GP 40AAAM4SMX Replacement, (Ni-MH, 4.8V, 400 mAh) Ultra Hi-Capacity Battery : Electronics
Dogtra Surestim H Plus+ Battery Ni-mh 4.8v 350mah For Dog Training Collar 7100h 175ncp 2/3aaa4sh - Rechargeable Batteries - AliExpress
Amazon.com: Synergy Digital Dog Collar Batteries, Compatible with HQRP CPU Dog Collar, (Ni-MH, 4.8V, 400 mAh) Ultra High Capacity, Replacement for GP 28AAAM4SMX, Battery, Combo-Pack Includes: 3 x DC-1 Batteries : Pet
Ni-CD AA 400mAh 4.8V Ni-CD Battery Pack Replacement for Emergency / Ex – Batteryhawk, LLC
4.8V 400mAh AA 4 in 1 Ni Cd battery with 5559 plug For Huanqi RC Tank 508 550 RC Car HQ 611 605 rc car battery 4.8v batteries|Rechargeable Batteries| - AliExpress
Small Tagged Ni-MH Batteries 1.2 V Cells for Custom Light NiMH RC Battery Packs | eBay
Replacement Battery for Dogtra Receivers & Transmitters - Battery Warehouse
Dogtra 1000NC, 1100NC, 1200NC, DT Systems Dog Collar Battery | Remy Battery
Dogtra 1202NC Dog Collar Battery (Ni-MH, 4.8V, 400 mAh) Battery - Replacement for GP - 28AAAM4SMX, GP - 40AAAM4SMX, Mighty Pets - BP-12, Sanik - 4SN-2/3AAA40H-H-XA1, Interstate - NIC0962 Batteries - Walmart.com