---
product_id: 3896984
title: "Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack)"
brand: "perimeter technologies"
price: "€ 70.89"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.nl/products/3896984-perimeter-technologies-four-pack-dog-fence-batteries-for-invisible-fence
store_origin: NL
region: Netherlands
---

# Extended durability Waterproof seal Lithium-ion tech Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack)

**Brand:** perimeter technologies
**Price:** € 70.89
**Availability:** ✅ In Stock

## Summary

> 🐾 Keep Your Pup Powered and Protected!

## Quick Answers

- **What is this?** Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack) by perimeter technologies
- **How much does it cost?** € 70.89 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/3896984-perimeter-technologies-four-pack-dog-fence-batteries-for-invisible-fence)

## Best For

- perimeter technologies enthusiasts

## Why This Product

- Trusted perimeter technologies brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Robust components provide enhanced durability for long-lasting performance.
- • **Weather the Elements:** Waterproof design keeps your battery safe and functional in any weather.
- • **Seamless Compatibility:** Designed specifically for Invisible Fence R21, R22, R51, and Microlite models.
- • **Lightweight & Efficient:** Superior energy density means less weight for your furry friend.
- • **Power Up Your Pup's Safety:** Innovative lithium-ion technology ensures your dog's collar stays powered longer.

## Overview

Perimeter Technologies Four Pack Dog Fence Batteries are engineered for compatibility with Invisible Fence R21, R22, R51, and Microlite receiver collars. These advanced lithium-ion batteries offer superior energy density, extended durability, and waterproof protection, ensuring your dog's safety and comfort.

## Description

Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack)

## Features

- Perimeter Technologies 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.
- Perimeter Technologies 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.

## Product Details

- **Number of Batteries:** 4 Lithium Metal batteries required.
- **Brand:** Perimeter Technologies
- **Battery Cell Composition:** Lithium Ion
- **Recommended Uses For Product:** Invisible Fence brand receiver collars, specifically the R21, R22, R51, and Microlite models
- **Unit Count:** 4.0 Count

## Images

![Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack) - Image 1](https://m.media-amazon.com/images/I/61yUrVgEdLL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is Invisible Fence's #3V PCP power cap the same power cap as these being sold?**
A: No, these are an off-brand replacement. The design is different, resulting in inconsistent fit.

**Q: Will these work on Microlite collars as well?**
A: I don't know. I have the Invisible Fence brand fence and the collars have Invisible Fence on the receiver. The batteries work well with them but that's the only experience I have. Sorry.

**Q: I have a perimeter technologies invisible fence r21 replacement collar - the battery in the picture looks different, will this battery work?**
A: I have the Invisible Fence brand and these replacement batteries work great.  These batteries are round and just pop in.  I believe they will work just fine for you.

**Q: What is the shelf life of these batteries?**
A: I ordered one package of 4 in November 2021 and they lasted us until July 2022, we ordered the same product in July 2022 since they worked so well, but the most recent package the batteries are lasting about two weeks. We’ve already gone through 3 and our dog is running amuck in the neighborhood. I have a feeling we just got a bad lot. Will try one more time….

## Customer Reviews

### ⭐⭐⭐⭐⭐ Definitely recommend.
*by B***N on May 2, 2025*

These cap batteries have become a staple in our home. We have multiple dogs on our Invisible Fence and their propriety batteries are far too expensive for their short life so I went looking for an alternative. Reasonably priced with markedly greater durability, these batteries are the answer! They are always delivered quickly and well packaged. Will continue to repurchase as needed.

### ⭐⭐⭐⭐⭐ Excellent
*by P***. on May 13, 2025*

Great product. Works very well!

### ⭐⭐⭐⭐⭐ Works well
*by E***1 on May 11, 2025*

Works as well as the invisible fence brand.

## Frequently Bought Together

- Perimeter Technologies Four Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars (4-Pack)
- Invisible Fence Power Cap Battery; Battery for (2-Pack) Electric Collar Batteries for Dog Collars Original Brand Product, Dog Collar
- Enerpe Dog Fence Batteries Long-Lasting & High Capacity Compatible with Invisible R21 R22 R51 and Microlite Fence Receiver Collars 8-Pack

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-24*