List of the 15 Best Invisible Fence Compatible Collar in 2022.

100% compatible with your R21, R22, R51, and MicroLite receiver. Our batteries are an exact aftermarket replacement to the Power Cap battery.

All of our replacement batteries for the electric fence have met or exceeded the original manufacturer’s specifications. Many dogs report that each of our Invisible Fence brand compatible batteries can last as long as 6 months.

K9 Battery is a company owned and operated by veterans and has more than 14 years of experience in selling compatible aftermarket batteries. You can trust that we've done our diligence in manufacturing the highest quality product possible.

All of our K9 Batteries have passed a strict quality inspection.

* SATISFACTION GUARANTEE: Unlike other inferior battery brands, we confidently stand behind our products and guarantee your 100% satisfaction. Rest easy knowing your investment is protected!

Easy-to-install containment and training kit includes everything needed to cover 1 1/3 acres of land for one dog; can be expanded to cover 100 acres with more wire and flags (sdf-wf) Contain + Train

Waterproof, rechargeable collar works with the fence boundary and the handheld remote; you choose when you want it to work with each system (fence, trainer, or both)

Contain an unlimited number of dogs with additional collars (sdf-ctr); train up to three dogs with included remote

Choose between Tone (beep), vibration (Buzz), or one of seven levels of static stimulation to contain/train your dog

Transmitter features wire break alarm and built in Lightning Protector

Includes two-year manufacturer’s warranty; call our US-based customer care Center for support

Specs: Medium (Adjustable for Necks From 13" to 18") | Width = 3/4" | Design: Pink Dots

Compatibility: Replacement for Invisible Fence Brand Collars, as Well as Other Name Brands (See Product Description for Model Details)

Directions: Unscrew the Contact Points on Collar Receiver, Remove Old Strap and Replace with eXtreme Dog Fence Strap, Adjust Strap to Fit Neck, Cut off Excess Strap and Heat End with Flame to Prevent Fraying

Maintenance: Strap Can be Machine Washed. Please Remove Receiver Before Washing

Add-On: Please See Our Amazon Store for Customized Bone Shaped ID Tags, as Well as Other Pet Fence Related Products and Accessories

Invisible Fence brand Compatible.

Works in R21, R22, R51, & Microlite Receivers.

Less Expensive than the original.

Guaranteed to work.

Best Value! Change your dog’s replacement strap, this collar fits perfectly on these models: PetSafe: UL-275V, UL-275M, UL-275D, UL-250, PUL-250 and PUL-275, PIF-275-19, PRF-275-19, Invisible Fence Brand: Micro-Lite, Extreme Dog Fence (Active and Stubborn), Perimeter, and Sport Dog: SDF-R.

Specs: 3/4 of an inch wide. 2 Bored holes 1.25" apart. Fits up to 26 inch neck.

Heavy duty nylon replacement strap with curved locking buckle.

Maintenance: Strap can be Hand Washed. WARNING: Remove Receiver before Washing!

100% Extreme Warranty – If your eXtreme Dog Fence Collar Strap ever fails you, including from chewing, you can call us and we will replace it at No Cost to You. We stand behind our product and value our loyal customers.

1/2 ACRE OF CIRCULAR COVERAGE: The adjustable circular range can cover up to 1/2 acres from the placement of the portable indoor transmitter

NO WIRE TO BURY: A wireless boundary allows you to create a secure barrier around your yard to protect your pets without the time or hassle of burying wires

STATIC-FREE REENTRY: Unlike traditional in-ground fences, this wireless fence allows your pet to return home without being corrected if your pet passes the boundary

SIMPLE SET-UP: Sets up in just a few hours; This portable system is terrific for camping and vacation homes

WATERPROOF COLLAR: The waterproof collar comfortably fits dogs 8 pounds and up and adjusts to fit neck sizes 6-28 inches; Compatible with all PetSafe Wireless Fence transmitters

LONG BATTERY LIFE: The collar battery lasts up to 2 months before the low battery indicator alerts you to replace the battery; Uses the PetSafe RFA-67D-11 battery

PERSONALIZE YOUR DOG'S COLLAR SETTINGS: Teach your pets to stay in the secure play area with a sound-only training mode plus 5 levels of static on his receiver collar

ADD MORE THAN 1 PET: Unlimited number of collars can be added to the fence system and set to match your pets' personalities

HIGH-PERFORMANCE-Our batteries replacement are 100% Fit R21,R22,R51 and microlite receiver invisible fence collars,stable conductivity and excellent quality make it the best choice for pet lovers.

WATER RESISTANT- The black O ring rubber is sure water resistant wtih collar or pet key.

LONG SERVICE LIFE-Our Unique battery it is last as orignal battery or longer

EASY TO USE-The 3 V lithium battery Coin slot is easy and quick for installation and take out,super convenient and safe for you!

UNIQUE DESGIN--The new appearance colorful design is really unique

Pack of 3 batteries.

The Perimeter Brand Invisible Fence Replacement Battery is the best solution for keeping your Invisible Fence Brand system operating safely.

Compatible with R21, R22, or R51.

Less Expensive than the original.

Specs: Large (Adjustable for Necks From 19" to 26") | Width = 1" | Design: Blue Bubbles

Compatibility: Compatible with Invisible Fence Brand Collars, as Well as Other Name Brands (See Product Description for Model Details)

Directions: Unscrew the Contact Points on Collar Receiver, Remove Old Strap and Replace with eXtreme Dog Fence Strap, Adjust Strap to Fit Neck, Cut off Excess Strap and Heat End with Flame to Prevent Fraying

Maintenance: Strap Can be Machine Washed. Please Remove Receiver Before Washing

Is your electric dog collar grimy and worn? It’s probably time for a replacement. Choose an exciting pattern to match your dog’s personality. Pick your design and size to fit your dog’s neck perfectly. Voila! Just like new.

Great designer look. Quality woven nylon. Everything you are looking for in a receiver collar with a curved locking buckle.

Sizes: Small – up to 12” /Medium – up to 18” /Large – up to 27”. 3 laser cut holes with 1-1/4" Spacing and 1-5/8" Spacing (Center To Center).

Strap can be Hand Washed. WARNING: Remove Receiver before Washing!

100% Extreme Warranty – We will replace the collar against wear, tear, breakage and chewing. We stand behind our quality products!