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Best invisible fence batteries - April 2026

Last Updated - April 2, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Perimeter Technologies

Perimeter Technologies Six Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars

Perimeter Technologies

$52.95

More Details
Main highlights
- These batteries incorporate advanced lithium-ion technology, boasting a superior energy density while keeping your dog's electric dog fence collar lightweight.
- 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.
- 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.
$52.95
2
Best Value
14% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Invisible Fence
14% Off

Invisible Fence Power Cap Battery - Original IFB Electric Fence Battery Replacement for Dog Collars - Long-Lasting - 2 Pack

Invisible Fence

$42.75

$49.90
(14% Off)

More Details
Main highlights
- Long-Lasting & Dependable Power: Keeps your dog’s electronic collar powered for weeks of consistent use, so your pet stays safely within your electric fence
- Keep Your Pet Safe: Designed exclusively for Invisible Fence brand collars, this original Power Cap battery ensures compatibility and reliability for your pet’s containment system
- Global Mission, Local Care: With U.S. roots and worldwide reach, PetSafe delivers vet- and trainer-recommended solutions and exceptional customer support to create fields of joy for pets
- Easy to Install & Safe for Pets – Simply screw the Power Cap into your dog’s collar with no tools required; meets all safety and performance standards to keep your furry friend secure and comfortable
- 27 Years of Trust: Since 1998, PetSafe has created safe, innovative, and trusted products that bring joy, enhance pet lives, and support the lifelong bond between pets and their families
$42.75
$49.90 (14% Off)
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Perimeter Technologies

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

Perimeter Technologies

$35.65

More Details
Main highlights
- These batteries incorporate advanced lithium-ion technology, boasting a superior energy density while keeping your dog's electric dog fence collar lightweight.
- 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.
- 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.
$35.65
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Perimeter Technologies

Perimeter Technologies Invisible Fence Collar Battery - Brand Compatible - Includes eOutletDeals Pet Towel (2 Pack)

Perimeter Technologies

$22.90

More Details
Main highlights
- These batteries incorporate advanced lithium-ion technology, boasting a superior energy density while keeping your dog's electric dog fence collar lightweight.
- The Invisible Fence Collar Battery ( 2 Pack) is bundled with an eOutletDeals Pet Towel
- 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.
- 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.
$22.90
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Perimeter Technologies

Perimeter Technologies Invisible Fence Collar Battery - Brand Compatible - Includes eOutletDeals Pet Towel (2 Pack)

Perimeter Technologies

$21.75

$22.90
(5% Off)

More Details
Main highlights
- These batteries incorporate advanced lithium-ion technology, boasting a superior energy density while keeping your dog's electric dog fence collar lightweight.
- The Invisible Fence Collar Battery ( 2 Pack) is bundled with an eOutletDeals Pet Towel
- 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.
- 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.
$21.75
$22.90 (5% Off)

Best invisible fence batteries - April 2026

Perimeter Technologies Six Pack Dog Fence Batteries for Invisible Fence R21 or R51 Receiver Collars

Invisible Fence Power Cap Battery - Original IFB Electric Fence Battery Replacement for Dog Collars - Long-Lasting - 2 Pack

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

Perimeter Technologies Invisible Fence Collar Battery - Brand Compatible - Includes eOutletDeals Pet Towel (2 Pack)

Perimeter Technologies Invisible Fence Collar Battery - Brand Compatible - Includes eOutletDeals Pet Towel (2 Pack)

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Perimeter Technologies Invisible Fence Collar Battery - Brand Compatible - Includes eOutletDeals Pet Towel (4 Pack)

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