{"product_id":"streng-cell-pet-fence-battery-pack-r21-r22-r51-compatible-5-pack-170mah-long-lasting","title":"STRENG-CELL PET-Fence Battery Pack – R21\/R22\/R51 Compatible, 5-Pack, 170mAh, Long-Lasting","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet the STRENG-CELL PET-Fence batteries, designed to fit Invisible Fence dog collars including R21, R22, R51 and Microlite variants. This 5-pack delivers built-in 3V lithium power with a 170 mAh capacity, engineered for reliable performance across outdoor adventures.\u003c\/p\u003e\n\n\u003ch3\u003eWhat’s inside the 5-pack\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eFive high-quality 3V Li-MnO2 batteries ready for quick swap.\u003c\/li\u003e\n  \u003cli\u003e170 mAh capacity provides extended runtime between replacements.\u003c\/li\u003e\n  \u003cli\u003eStorage-ready design with a shelf life of five years when stored properly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey features and benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHundreds of hours of use per battery with consistent performance in varying temperatures.\u003c\/li\u003e\n  \u003cli\u003eWaterproofing and secure fitting help protect the collar receiver during rain, puddles, or sprinklers.\u003c\/li\u003e\n  \u003cli\u003eEasy coin-based installation and removal for quick field swaps.\u003c\/li\u003e\n  \u003cli\u003eStrict quality checks to ensure the battery cap stays in place and the unit remains reliable.\u003c\/li\u003e\n  \u003cli\u003eCost-effective replacement with a five-pack that balances availability and value.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility and fit\u003c\/h3\u003e\n\u003cp\u003eFully compatible with Invisible Fence collars R21, R22, R51 and Micro Lite variants. A simple replacement path means you can keep your setup running with minimal interruption.\u003c\/p\u003e\n\n\u003ch3\u003eReal-world use scenarios\u003c\/h3\u003e\n\u003cp\u003eOn daily dog walks, in parks, or during backyard play, the battery can power the collar receiver for months, depending on dog activity. The waterproof design helps protect against accidental splashes or light rain.\u003c\/p\u003e\n\n\u003ch3\u003ePerformance at a glance\u003c\/h3\u003e\n\u003cp\u003eEach battery offers up to 3–4 months of use under typical activity. Energetic dogs may reduce this interval, so keeping extras on hand helps minimize downtime.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHave a coin handy for quick removal and replacement.\u003c\/li\u003e\n  \u003cli\u003eEnsure the battery cap is snug to prevent loose connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eStore in a cool, dry place to maximize shelf life. When installed, monitor performance and replace as needed to avoid interruption.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these batteries compatible with Invisible Fence collars?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, STRENG-CELL PET-Fence batteries are compatible with R21, R22, R51, and Microlite collars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long do the batteries typically last per charge?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Typically 3–4 months per battery, depending on dog activity and usage patterns.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"STRENG-CELL","offers":[{"title":"Default Title","offer_id":53555580469577,"sku":"B09WZ8QQKD","price":31.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/1781\/9465\/files\/streng-cell-pet-fence-battery-r21-r22-r51-pack.jpg?v=1766356908","url":"https:\/\/petvita.co.uk\/products\/streng-cell-pet-fence-battery-pack-r21-r22-r51-compatible-5-pack-170mah-long-lasting","provider":"Petvita","version":"1.0","type":"link"}