Power Sonic 12V 7Ah Battery Replacement for Verizon Fios Systems 12 Volt 7 Amp

The FIOS box began to alarm and show a red light for battery replacement after about 2.5 years on the original battery. This doesn't seem like a long life for the original battery, but we have had a number of power failures that may have weakened the battery. I have not had this battery long enough to evaluate it in the FIOS box, but I have two identical Power Sonic batteries in the UPS that powers my computer, and they have lasted for years with no failure yet. Power Sonic appears to make a quality battery that will not fail prematurely, a complaint that some Amazon customers have with cheaper batteries advertised for FIOS. This battery may be available for less money elsewhere, but free shipping of this heavy item from Amazon makes this a reasonable deal. This is a 1270 battery with F1 terminals rated at 12V 7 AMP, a standard AGM type that has many uses for backup, and it fits perfectly into the FIOS box. If you are shopping around for other sources, look at stores that advertise batteries for emergency lighting. They tend to be less expensive than batteries advertised for replacement in a UPS.UPDATE - June 2021This battery lasted more than 3 years and was replaced with the same type Power Sonic battery. After about a year on the replacement battery, the FIOS box alarmed with the bad battery light. I disconnected the wires from the battery and then reconnected it. This stopped the alarm, which remained quiet for a few months. Now the box alarms every few months and I go through the same disconnect-reconnect procedure. It's as if the electrical connection with the battery goes bad after some time. I had a similar problem with Power Sonic batteries in the UPS. One of the battery terminals became so hot that it burned the plastic insulation on the wire. I'm not sure if this is a valid commentary on Power Sonic batteries, but try the disconnect-reconnect trick if the box alarms. As of now, I will continue to buy Power Sonic batteries.

The vendor delivered what I needed according to the schedule presented at purchase. It worked perfectly! Who can ask for anything more?

Fits fine. No idea on longevity yet, will change review if it fails before 24 months.I have one of the earlier FIOS installations, no way to get rid of the beep when a battery fails even though my FIOS and other networking gear is on a big UPS - so I don't need the functionality (voice-only for the first few hours of a power outage) this battery enables.

Have used this brand for years. Always last for 4 or 5 years without any problems. Used for alarm system and UPS system.

working great