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

Product overview

Meet a cost-effective replacement option from Perimeter Technologies. These six lithium-ion batteries are engineered to power Invisible Fence receiver collars, specifically the R21, R22, R51, and Microlite models. They offer respectable energy density in a compact package to keep your boundary system ready for action without adding unnecessary weight to your dog’s collar. The six-pack format helps you stay prepared for routine maintenance and reduces downtime when a battery runs low.

The design emphasizes performance without bulk, so your dog can move freely whether indoors, in the yard, or on a short walk. When properly sealed inside the collar, the rubber waterproofing seal helps protect the battery from moisture during light rain, splashes, or damp conditions. This combination of efficiency and protection supports steady operation across everyday activities.

Key benefits

• Compatibility with multiple collar models including R21, R22, R51, and Microlite for flexible replacement.
• Advanced lithium-ion technology delivers higher energy density while staying lightweight.
• Lightweight design helps maintain collar comfort during extended wear.
• Rugged components provide extended durability and enhanced safety features compared to standard batteries.
• Waterproof sealing ensures protection when the collar is worn in damp or wet conditions.
• Cost-effective replacement option to keep your system powered as needed.

Real-world use

In daily scenarios, having a six-pack on hand means less downtime when a battery runs low. The compact cells fit inside the receiver collar without adding bulk, while the high energy density supports reliable signaling during yard play, walks, and training sessions. Outdoors or near water, the waterproof seal adds reassurance for weathering light rain or splashes. The lightweight construction helps maintain comfort on long outdoor excursions.

Installation and care

To install, verify model compatibility, remove the old unit following your collar’s guidance, insert the new cell with correct polarity, and re-seal the collar to maintain waterproof protection. Always handle with dry hands and inspect the seal for a snug fit. Regular inspections help ensure continued performance and collar comfort.

What you get

• Six replacement batteries tailored for Invisible Fence collars
• Compatibility with R21, R22, R51, and Microlite models
• Reliable power for everyday boundary use

This replacement battery set is designed to integrate with existing Perimeter Technologies gear, offering a practical maintenance option for households relying on a reliable boundary system.