Invisible Fence Brand Compatible Rechargeable Battery with Charger

I bought this device with my fingers crossed. I was hoping that it would free me from having to pay $20+ every three months for a new battery from Invisible Fence Co. So far I am satisfied, but it's only the third week. I'll update this review once I know how long each charge lasts, and what the recharge time is. Now, to the meat of my review:1) If you are like me, then you cannot find any information on your Invisible Fence Co. collar or battery that indicates what size your battery is. The battery guide indicates "Compatible with Invisible Fence R21, R22, R51 and Microlite Collars". Truly, I have no clue which one is which. IF you scroll through the product pictures on Amazon, the fourth one displays images of the compatible collars. I found a collar that looked like mine, and ordered with fingers crossed.2) The installation tool. It's indispensable, about the diameter of a nickle, and has nowhere to live between uses. What does that mean? It is destined to get lost. The best you can do is be careful to always put the tool away in the same safe place after you charge your battery every 3-4 weeks. The tool is a nondescript, black circle that most folks would wipe off the counter with trash or toss in a junk drawer (never to be seen again). Do not let that happen. The instructions state several times that you have to be careful to not over tighten the battery. To be clear, the battery does require some finger strength to seat properly, but over tightening may cause the plastic housing to crack. I read other reviews where people indicated that their battery had fallen out of the collar. I can only conclude that those folks either did not have a compatible collar or that they didn't tighten the battery enough. It's a tough balance, I know. My battery fits into my collar like a puzzle piece, and is not going anywhere.3) Post installation. Not much to say yet. It's only been a few weeks. The battery installs easily, and has a green indicator light that flashes periodically to let you know that it's charged. The light will change to red when charging is necessary. The reviews indicate a 3-4 week charge is common. My dog does not test the Invisible Fence often, so I anticipate our battery lasting 4+ weeks. Also, our fence is set on the lowest correction level. Larger dogs on a higher correction level or dogs who test the fence boundary more often will likely drain the battery faster. I did personally test the collar by holding the probes, and crossing the boundary line of our invisible fence. Simply put, it works. Ouch!—-——1/22/21—UPDATE————————-I love this product despite its quirks! After two years it’s paid for itself three times over. The battery fell out once (inside thankfully) because I didn’t install it properly. There is a knack to it that you have to get a feel for. I charge mine overnight on the first of each month (the same day we give our pup his heart worm pill). I upgraded my rating from 4 to 5 stars.

This product seemed like a great, economical alternative to purchasing disposal batteries which we had been doing for over 5 years. However, in the three months since we have been using the Circuitcell batteries, they have proven to be not worth the risk to our dogs life. The problem is that the battery has dropped out of the collar on two occasions (different battery each time). The first time, I assumed operator error, and very carefully put in the second battery. It, too, dropped out after only two weeks. The first we found the battery in the house; the second I assume is somewhere in our yard. Neither the collar nor batteries seem to be damaged in any way, the battery just does not lock in like the name brand battery it replaces. Since this means the collar can be non-functional at any time, we are going back to the name brand.

I've always hated that our invisible fence batteries were disposable. So I was delighted when I stumbled upon this product. For our dog, the battery lasted well past 30 days. I can't say precisely how long it lasts between charges, but I estimate 5-6 weeks. Charging takes somewhere around 3-4 hours. My one complaint is that I wish there was a different method for checking the current charge. The led indicator flashes once every 30 seconds, green if it is charged and red if the battery is starting to get low. At only once every 30 seconds, it's easy to blink and miss the flash (is it dead? Or did it flash when I blinked?). It would be nice if it flashed a little more frequently or perhaps had a button you can push to have it flash. Since the battery is Lithium-Ion, once it is close to depleted, it's dead shortly thereafter. Between that and the slow flashes, we sometime miss that the battery has died. Luckily our dog is trained well enough to not push the boundaries for a day or two.Beyond that one griped, I highly recommend this product.

I cannot say enough great things about this product and the customer service at the company. I was skeptical but thought it was worth a try. After receiving the product, I followed all of the instructions but it didn't seem to work. I thought it then might be the collar but after a visit to the Invisible Fence office, I realized the collar was working fine. I sent an email to Invisicell and was shocked to receive a call back the same day! The gentleman couldn't have been nicer and assured me that he would "make it right" even if he had to send me a new one. It turned out to be user error in that I didn't tighten the battery enough. It's been one month and I just needed to charge it for the first time. Works perfectly!!!It's an amazing product and it's even better knowing the company stands behind it and has such wonderful customer service! I have told anyone I know with the Invisible Fence this is a must buy! I honestly have no connection to this company except as a customer. If you are considering it, go for it! Thank you Invisicell!

It worked great for about a year... then the battery itself broke while putting it back into my dogs collar. Charge lasts about a month. Now I need to find a replacement battery for mine.