Perimeter Technologies is the only company offering a fully compatible range of products as replacement for OEM Invisible Fence® brand products. This range includes replacement collar receivers for both 7K and 10K frequencies.
Replacement battery for R21, R22, R51 and MicroLite® receivers.

This 3-volt lithium cell battery has a battery life of up to 4 months. It is made from ABS Thermo-Plastic with a water-tight seal. These batteries are innovative little marvels of technology that work flawlessly with the Invisible Fence® receiver collar. They’re ranked the highest on the market in durability and performance, and relatively inexpensive when evaluated next to batteries from other companies.
These compatible replacement batteries require no tools to install and are tamper-proof. The contact material is designed to be stronger for better connectivity and is corrosion resistant. Perimeter Technologies and its retailers do not represent that they are affiliated with the Invisible Fence® company in any manner. Invisible Fence®, Computer Collar® and Power Cap® are registered trademarks of the Invisible Fence® company. These replacement batteries are not Power Cap® batteries, rather they are an aftermarket replacement for the Power Cap® battery.
Invisible Fence® is a registered trademark of Radio Systems Corporation. All rights reserved.
Perimeter Technologies, Inc. is not affiliated with Invisible Fence®.

Patent Pending