Invisible Fence Compatible R21 and R51 Dog Collar Battery Year Supply

Each battery will last as long or longer the real Invisible Fence Brand PowerCap batteries. Compatible with all Invisible Fence Brand R21, R51 and MicroLite electronic dog fence receiver collars. The battery design was approved by the chief engineer at the Invisible Fence Company and are manufactured in a state of the art facility in Pennsylvania under his supervision. Includes 3 batteries which will last a year under normal usage. 3-volt lithium-ion battery Average battery life of 3-6 months Rubber gasket provides a water tight seal Tamper proof design with coin slot for battery removal