B3V 1A Replacement Battery High Capacity Compatible with High Tech Electronic Collars of MS-4 and MS-5 Pack of 6

These are very good batteries. Our dog has his own door for outside and the battery goes in to the chip that is on his collar. It opens and closes his door. The battery last at least 3 months. Also I needed the batteries quick and they arrived early the next day. I am very satisfied and highly recommend this battery.

As expected and cost less than the other website

We buy these for out dogs collar to get in an out of the automatic door. They last well over a month or more. She is a little dachshund and loves to go outside to sun herself so she is in and out a lot. When the automatic door is slow to open we change out her collar battery for a new one because we don't want her to get stuck outside. So there is probably some life left in the battery which gets thrown away, but we love our dog like family and don't want any harm coming to her out here in the country where coyotes roam.

Works excellent in our dogs collar for the auto door!Original battery lasted about 4 months and we had a month of single digit weather.Will see how long this lasts.

Great price, works in my dog collar. Thanks!

yep, worked

I am so glad I found these. We have electric doggy door and two dogs and these work just as well as the expensive ones.

These batteries work great. Long lasting. Best value for money.