Pet-Fence Compatible Invisible Fence Battery for Dog Collar - 10 Pack

In this review of the Pet-Fence Compatible battery pack, the bottom line is simple: this 10-pack is aimed at pet owners who need an affordable, easy-to-replace power solution for older Invisible Fence style receivers. It stands out because each cell is a built-in 3V lithium unit with a stated 170 mAh capacity and long shelf life, which makes it a practical spare-part purchase for households that rely on radio fences for dog containment. The reviewer found it most useful for routine replacement when original batteries run low and appreciates the clear compatibility notes and coin-access installation.

Key Features

• Compatibility: Works with Invisible Fence model collars listed as R21, R22, R51 and Microlite, so buyers can swap cells without buying new receivers.
• High capacity: Each battery is rated at 170 mAh which the manufacturer says should run a typical collar for about 3-4 months under normal use.
• Built-in 3V lithium chemistry: Uses Li-MnO2 construction designed for stable voltage and a long storage life of more than five years.
• Pack quantity: Includes 10 individual batteries, which is convenient for multi-pet homes or keeping spares on hand.
• Water resistance: The power cap design claims good waterproof performance to help protect the collar receiver in everyday outdoor conditions.
• Easy installation: The coin-turn install and removal method is straightforward and does not require special tools.

Who It's For

This battery pack is best for owners of Invisible Fence style collars who want an economical source of replacement power, especially those with multiple dogs or who prefer keeping a stock of spares ready. It fits customers who value long shelf life and straightforward coin-access replacement over branded original cells.

It may not be ideal for owners who need verified OEM warranties or who want batteries with independent long-term laboratory life-cycle data; some users report mixed performance and occasional early failures, so buyers who need absolute consistency might look to manufacturer-direct replacements.

Pros & Cons

Pros

• Good value for a 10-pack, reducing per-battery cost for households with several collars.
• Clear compatibility with R21, R22, R51 and Microlite models simplifies purchasing.
• Long stated storage life and 3V Li-MnO2 chemistry offer reliable shelf stability.
• Waterproofing on the cap helps protect the receiver in wet conditions.

Cons

• Some customers report inconsistent runtime and a few early failures, so occasional replacement may be needed.
• Not an OEM-branded cell, which may concern buyers seeking manufacturer warranty or certified lifetime data.

Specifications

Compatible Models	R21, R22, R51, Microlite collars
Battery Type	Li-MnO2 built-in 3V cell
Capacity	170 mAh
Quantity	10 pieces
Storage Life	More than 5 years
Safety Testing	Passed thermal, short circuit, forced discharge, shock and crush tests

Our Verdict

For pet owners who need a cost-effective source of replacement batteries for Invisible Fence style collars, this 10-pack delivers sensible value and convenient coin-access installation. It is a practical buy for those who keep spares on hand and accept some variability in runtime in exchange for lower cost per cell.

Frequently Asked Questions

Are these batteries compatible with Microlite collars?
Yes, the pack lists compatibility with Microlite as well as R21, R22 and R51 models.

How long does each battery last in a collar?
The stated runtime is about 3-4 months under typical use, though heavy use or individual variations can shorten that period.

Is the battery waterproof once installed?
The power cap is described as having good waterproof performance to help protect the collar receiver in outdoor conditions.