OldSchool—February 3, 2026✓ Verified purchase
Replaced the backup battery in our LiftMaster garage door opener. Way cheaper than the name brand that was originally in the device, fits just fine and works perfectly. One note: the measurements they give on the website looked a little too large in the height vs. what I measured on the battery I was replacing. I finally realized that they were measuring from the tops of the 2 +/- terminals on the top, which added about 1/4 inch or so. Definitely recommend this as a replacement. Read more
T. Small—December 29, 2025✓ Verified purchase
Installed in garage door opener several months ago and it is working well. Much cheaper than original battery recommended Read more
nelson malony—February 12, 2026✓ Verified purchase
Product arrived quickly and was what I expected. Good price. Read more
M. Benedict—October 20, 2024✓ Verified purchase
This installed fine, charged right up and works. The vender includes card to scan to register and get extended time. Good luck doing that! Would not let any of my computers at browsers get to the registration page. And there is nothing on the home page to link to it either. So, just assume there is NO warranty! Read more
Stephen L. Tench—November 5, 2025✓ Verified purchase
This is the second time I have bought this battery to replace a failed Liftmaster branded battery. I’m not complaining about the OEM batteries because they lasted 10 - 12 years as backup power for two garage door openers. The first Mighty Max replacement battery has functioned perfectly for 2-1/2 years, so I knew this battery would be a good choice to buy again. Like my first purchase experience, the battery slid into its place and was wired to work in less than 10 minutes. Also like last time, this was the most economical battery of its type available to purchase from Amazon. The big surprise was that the purchase price was identical to what the first replacement battery cost in January 2023. Read more
chris—January 8, 2026✓ Verified purchase
These batteries were perfect replacements for my battery backup garage door opener they worked perfectly for LiftMaster replacements Read more
Andrew D. Rodney—March 12, 2026✓ Verified purchase
Beeping in the garage, found out it was a dead backup battery for the garage door opener. The battery for our Liftmaster from them was $120, OUCH. This was under $20. Fit perfectly, took 2 minutes to install, no more beeping. Why pay more? Even if it doesn't last 11 years like the original, it's a fraction of the cost of the OEM. Read more
Keith Macksey—February 2, 2026✓ Verified purchase
Arrived on time and as promised. Easy install. Works like a charm. Read more
