Compatible Invisible Fence Brand Batteries by Extreme Dog Fence

It fits snugly into your existing R21, R22, or R51 receiver made by Invisible Fence®, but costs only a fraction of the price of Powercap® batteries.

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Invisible Fence® Brand Compatible Battery

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Extreme Dog Fence 6v Battery for Underground Electric Dog Fence Collar Receivers - 1 Pack : Extreme Dog Fence : Pet Supplies

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