Dog Fence Batteries (6 Pack) Compatible with Invisible Fence R21, R22, R51 Receiver Collars and Microlite | Perimeter Dog Battery Replacement for Power , Dog Training

offers a cost-effective solution by providing a compatible replacement battery designed for Invisible Fence brand receiver collars, specifically the R21, R22, R51, and Microlite models. has innovatively engineered a battery to seamlessly replace your current one in the collar models listed above. These batteries incorporate advanced lithium-ion technology, boasting a superior energy density while keeping your dog's electric dog fence collar lightweight. Equipped with robust components, this battery delivers extended durability and enhanced safety features compared to standard batteries. It also remains waterproof when securely sealed within your collar using a tight rubber waterproofing seal.