Casil Goldtop GT12080-HG 12v 8ah Battery for Fios F2 CA1280

Had a perfect fit, plugged it in and worked fine. No problems.

There's not much to be said about a battery--they all pretty much look and perform the same. The issue is customer service. I did have a problem with my battery's performance, and when I gave a detailed explanation, the seller made an exception to their usual and customary policy, and did the right thing. Unlike so many of the Amazon sellers, this is a seller that actually stands behinds its products. I recommend that you do business with them.

Fit like the original battery for my FIOS box backup battey compartment.

Worked great as a backup battery for FIOS cable for 20 months. Trying a different brand for better longevity. I never cycled the battery, it was always fully charged, since I did not lose power, hence needing a backup. It starts beeping when the battery is weak, might try a less ah battery for that, prob won't last longer but they are cheaper. My $0.02

Bought as a replacement for the backup battery of our FIOS box. Easy swap out and hook up. Identical to the old one (also Casil) in all respects other than being made in Vietnam ( vs. China before). Hopefully it'll last as long as the prior replacement did (~4 years)?

Easy installation and works great.

Purchased Feb. 11, 2023. This battery lasted less than a year. FiOS ONT started replace battery beeping in early December, 2023. Will purchase a different replacement this time.

This battery has a good price and did the job. Also easy to install.