{"product_id":"perimeter-technologies-four-pack-dog-fence-batteries-for-invisible-fence-r21-r51-collars","title":"Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21\/R51 Collars","description":"\u003ch2\u003eReliable, affordable battery replacements for Invisible Fence collars\u003c\/h2\u003e\n\u003cp\u003eIf your Invisible Fence receiver is part of your daily routine, you want a solution that’s dependable and budget-friendly. Perimeter Technologies Four Pack Battery Set offers compatible replacements for R21, R22, R51, and Microlite collars, delivering solid power without paying a premium for brand-name parts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible and straightforward: a direct replacement for the R21, R22, R51, and Microlite models with a snug fit and steady performance.\u003c\/li\u003e\n  \u003cli\u003eEngineered for longevity: new and improved Japanese lithium-ion cells provide high energy density for longer use between charges.\u003c\/li\u003e\n  \u003cli\u003eLightweight design: energy-dense cells help keep the collar lightweight, contributing to your dog’s comfort during walks and training.\u003c\/li\u003e\n  \u003cli\u003eDurable and safe: robust components and a water-sealed design aimed at reliable performance in outdoor conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDurability matters when your dog spends time outdoors, and these batteries are built with that in mind. The waterproof seal helps protect the internals when the collar faces moisture or wet weather, while the enhanced energy density supports longer intervals between replacements. The result is a practical balance of power, weight, and resilience that fits into real-life routines without adding unnecessary complexity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWaterproof sealing helps guard against moisture exposure, reducing potential corrosion over time.\u003c\/li\u003e\n  \u003cli\u003eCost-effective multi-pack: a four-pack means fewer trips to the store and more predictable budgeting for replacement parts.\u003c\/li\u003e\n  \u003cli\u003eValue-driven choice: Perimeter Technologies offers a dependable alternative to higher-cost brand batteries while maintaining compatibility with trusted collar models.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn everyday use, plan for ordinary routines like daily yard checks, weekend adventures, and occasional collar swaps. With a four-pack on hand, you’re prepared for routine battery changes between walks, training sessions, or seasonal maintenance. While results can vary with use, many dog owners appreciate the straightforward replacement workflow and the feeling of readiness that comes with having compatible, high-quality power on hand. If you’re seeking a practical, lower-cost option to keep your Invisible Fence system running smoothly, this four-pack provides a credible, no-nonsense choice that emphasizes compatibility, durability, and value.\u003c\/p\u003e\n\u003ch3\u003eWhy choose Perimeter Technologies\u003c\/h3\u003e\n\u003cp\u003ePerimeter Technologies emphasizes practical, tested components designed to support compatible Invisible Fence collars. This four-pack approach focuses on delivering dependable power with an emphasis on longevity, lightweight design, and waterproofing. It’s a sensible option for pet guardians who want to reduce ongoing replacement costs while maintaining consistent performance for their dog’s boundary system.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Which receiver collars are compatible with these batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Compatible with Invisible Fence R21, R22, R51, and Microlite receiver collars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What are the advantages of using Perimeter Technologies batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Cost-effective, high energy density lithium-ion cells deliver longer life and lighter weight for your dog’s collar.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Perimeter Technologies","offers":[{"title":"Default Title","offer_id":53550912340297,"sku":"B00BR0CA8M","price":48.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/1781\/9465\/files\/perimeter-technologies-four-pack-batteries-packaging.jpg?v=1766234222","url":"https:\/\/petvita.co.uk\/products\/perimeter-technologies-four-pack-dog-fence-batteries-for-invisible-fence-r21-r51-collars","provider":"Petvita","version":"1.0","type":"link"}