3V Replacement Battery for Invisible Fence Power Cap [2, 3, 4, 6 Pack Options] - Compatible with R21 R22 R51 and MicroLite Receiver Collars

🎁 BUNDLE & SAVE: Choose our 4-Pack or 6-Pack for the best value per battery!
Ensure your pet stays safe with fresh spares always on hand.

🐕 Reliable Protection for Your Furry Friend

• ✅ Seamless Compatibility: Perfectly engineered to replace the Invisible Fence® Power Cap®. Works flawlessly with R21, R22, R51, and MicroLite receiver collars.
• 🔋 Long-Lasting Performance: High-density 3V Lithium cells ensure your pet's collar stays active for months, providing consistent containment and peace of mind.
• 🛡️ Waterproof Design: Features a high-quality rubber O-ring seal to maintain the waterproof integrity of the collar, allowing your dog to play in all weather conditions.
• 💰 Premium Value Bundles: Available in 2, 3, 4, or 6 packs. Get dealer-level reliability at a fraction of the cost.
• 🚚 Free US Shipping: Essential pet safety delivered straight to your door with zero shipping costs.

Never Let the Fence Go Down

An invisible fence is only as good as the battery powering the collar. The GuanmeiTech 3V Replacement Battery is designed for pet owners who refuse to compromise on safety. Our batteries are rigorously tested to ensure they meet the high-discharge standards required by Invisible Fence® systems.

Installation is effortless—simply twist and lock. The integrated rubber gasket ensures a tight seal, protecting the sensitive internal electronics of the collar from moisture and dirt. Whether you have a playful puppy or a seasoned explorer, this battery keeps them where they belong—safe at home.

Product Specifications