B3V 1A Replacement Battery High Capacity Compatible with High Tech Electronic Collars of MS-4 and MS-5 (8-Pack)

I buy them for my dogs electronic dog door.

Our cat door opens when our cat (collar) gets close. It then closes behind him. Excellent door to keep out unwanted critters and no more flap blowing open in high winds.The collar uses these batteries. I rarely have to change the battery.

Works great in dog collar

Good texture. Not greasy. Soaks fight in!

These work perfect and last long.

I knew when purchasing these that the price to battery ratio didn't add up. But I got them anyway hoping they'd work. I use these batteries for a dog collar for a electronic dog gate. The first one lasted about a week and then everyone after that didn't last even a full day before dying. Do yourself a favor and just purchase a real battery for whatever your doing. Save yourself the headache.

Although the codes on the batteries are the same as the one I wanted to replace, they did not power the unit that needed them and by the time I tried them, it was too late to return. It was a cat 'remote control' collar for a pet door. Make sure the battery in the unit you are buying it for is not 'custom' -

Don't buy these. They are over priced by ALOT. It's rather easy to rig standard cr batteries to work in place. I highly recommend you look for the DIY fix or alternative battery supplier who ain't gonna price gouge you.