Synergy Digital Dog Collar Batteries, Compatible with Pet Stop UltraMax Receiver Dog Collar, (Silver Oxide, 7.5V, 110 mAh) Ultra High Capacity, Combo-Pack Includes: 2 x SDDC-S1114 Batteries

We had no issues with our batteries, received 2 of them both lasted about 6 months

Neither of the 2 batteries received had a charge that would even register on my tester.

Good price and fast shipping. First time trying them, so not sure about battery life.

All good !

These batteries work great on 70s CB hand microphones that I have

One battery lasted about two weeks, the second one master two days. The brand name batteries from pet stop usually last at least six months