Description
xCompatible, cost-saving replacement for Invisible Fence collars
Meet Perimeter Technologies four-pack batteries, a cost-conscious replacement designed for Invisible Fence receiver collars. This pack covers popular models including R21, R22, R51, and Microlite, letting you swap in a ready-to-use power source without changing your existing setup.
Performance you can feel on the collar
Inside each battery sits a new and improved Japanese lithium-ion cell lineup, delivering higher energy density while keeping the collar lightweight. The result is a balance of dependable power and comfortable wear for active dogs during backyard training and daily walks.
Perimeter Technologies builds with robust components to enhance durability and safety compared with standard batteries. When securely sealed in the collar, a tight rubber waterproofing seal helps protect the internals from moisture during rainy days or splashy play.
Why this matters
- Cost-effective option designed to replace existing batteries in compatible Invisible Fence collars.
- Seamless compatibility with R21, R22, R51, and Microlite models for easy upgrades.
- High energy density lithium-ion cells offer more power without adding bulk to the collar.
- Quality construction supports longer life and safer operation compared to typical batteries.
- Weather-ready waterproof sealing helps maintain performance in outdoor settings.
Real-world use and expectations
In everyday life— from morning park runs to backyard training sessions—these batteries are built to perform when it matters. They aim to deliver steady power, minimize downtime, and provide a budget-friendly alternative for households with multiple collars.
Note: Benefits described are potential improvements you may experience; actual results vary with usage and collar compatibility.
- Potentially longer run times between replacements.
- Lower total cost of ownership than using brand-name alternatives.
- Simple, tool-free installation to reduce maintenance time.
- Consistent power delivery that aligns with routine boundary management needs.
Bottom line
Perimeter Technologies four-pack batteries offer a practical, cost-aware option for keeping your Invisible Fence system running smoothly. By combining modern lithium-ion chemistry with durable design and a waterproof seal, they stand as a thoughtful replacement choice for busy dog households.
FAQ
Q: Which collars are compatible with the Perimeter Technologies four-pack?
A: R21, R22, R51, and Microlite Invisible Fence receiver collars.
Q: What benefits might users notice?
A: High energy density lithium-ion cells may extend run time and reduce collar weight for daily use.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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