2CR1/3N 6 Volt Dog Collar Receiver Battery for Pet Stop PCC-100/200 Series Receiver, Dog Guard DG-3000/5000/9000 Series Receiver and Extreme PTPIR-003, PTPFS-003 Series Receiver, 4 Batteries

Using for dog collar. Installed but did not work. Tested batteries with multimeter and they were fully charged. Closer inspection revealed that blue plastic wrap overlapped edge of the + terminal. This prevents contact with the collars cap that screws onto seal the battery in the compartment. Used exacto knife around that edge to remove the overlapping plastic and the batteries work like a charm. (No need to worry about negative "-" end of battery, spring contacts center and overlap plastic wrap is not an issue).

Batteries work in our dogs collar, they didn’t align at first but we scraped off some of the plastic and now the metal is touching.

Does not work for the extreme dog fence. I tried three collars, all the batteries, inserted both ways just to be sure. None of the batteries worked. They are smaller in diameter than the previous battery even though marked the same.

This dog collar receiver battery is a good replacement. I had two dog collar receivers that needed new batteries, I was happy to find this in a four pack.

I bought these for my 2 dog collars to make sure the underground fence will continue to keep the dogs in thes battery’s were a perfect fit and were charged and ready to get to work great batteries great price