These replacement dog fence batteries fit all Invisible Fence Brand R21, R51, or MicroLite electronic dog fence receiver collars. All Invisible Fence Computer Collar series are compatible, including Titanium, Platinum, Graphite, and Mink versions. Works in place of PowerCap Battery.
Invisible Fence brand Compatible.
Works in R21, R22, R51, & Microlite Receivers.
Less Expensive than the original.
Guaranteed to work.