New LiftMaster 485LM Battery Backup for Garage Door Openers 3840 3850 8360 8550

I purchased this battery from the Amazon seller "AAA Security Depot USA". There were several listing for this same item by various sellers, all to be fulfilled by Amazon, and many with prices that were nearly identical. In reading the reviews, which Amazon seems to lump together for all sellers, I noticed that some buyers complained that the batteries they had received had older production dates than they'd prefer. I specifically chose the seller AAA Security Depot USA because one reviewer said the battery that he purchased from this seller was very fresh. That's exactly what I was looking for. My previous battery would no longer hold a charge. It had been installed brand new into a new Liftmaster Garage Door opener that I purchased in Nov. 2018. That battery had a production date of 07/2018, so it lasted installed and in use for exactly 6 years before it started beeping that it needed replacement. This new replacement battery I ordered from AAA Security Depot USA arrived the first week of March 2025, and had a production date stamped on it of 10/30/24. Just like the original, it was sold within 4 months of it's production date, so I had no worry that it had been sitting on a warehouse shelf for an extended period. I had looked all over the web for the best price, including on the Liftmaster website itself. The price offered by this seller was the second lowest I could find, and less in total than even what Liftmaster offered because Amazon had free shipping, and the Amazon fulfillment/shipping time was quicker! This new battery arrived FRESH to my doorstep in just 2 days. It doesn't get easier than that!

This battery was the exact fix I needed for my garage doors. It was easy to replace and a great value! Didn’t need to call out the repair guy for emergency weekend fix! Thank you for saving me money and time!

I'd never switched out this battery before--didn't even know I'd need to! But, beep, beep, beep let me know. Easy to install. One terminal wire seemed loose, but it charged up, so I'm happy.

Funcionaron a la perfección para las puertas del garage hasta ahora luego de probarla unos meses no he tenido inconvenientes

Was extremely easy to change out - and no more beeping!

Works great

The battery came quickly and worked great.

Perfect fit. Easy to install. Took less than 5 minutes.