2-Pack Dog Fence Battery for Invisible Fence® Brand Dog Fence Collars

Description:

2 Replacement batteries for Invisible Fence® R21® & R51® receivers.

This battery was designed and improved by many of the same team that designed the original Invisible Fence battery. It is guaranteed to perform at least as well as the original – if not better!

In fact, this battery performs so well that it has been patented in it’s own right.