FireAngel FA6620 Optical, Battery Powered Fire/Smoke Alarms for Home | 1-Pack, 10-Year Battery Smoke Alarm Detector, Replacing FireAngel ST-622/ST-620, Fire Alarms for Home

Thankfully it has never been actually tested with a fire, so cannot answer.

I'm a loyal FireAngel customer and these smoke alarms maintain the brand's excellent reputation. The quality and reliability are second to none, which is exactly what you want from a safety device. Installation is straightforward and they're up and running quickly. The optical sensor technology works perfectly - sensitive enough to detect real smoke threats but smart enough to ignore false alarms like vaping, which is a huge advantage over cheaper detectors. The alarm tone strikes the perfect balance - loud enough to wake you and alert the household, but not so overwhelming that it's painful. There's no annoying constant beeping during normal operation either. The 10-year battery life is fantastic - set and forget peace of mind. The white finish looks clean and unobtrusive on the ceiling. Pro tip: pair these with magnetic mounting pads (as mentioned in my other reviews) for incredibly easy installation without drilling. These are premium smoke alarms that justify the price with superior performance and reliability. When it comes to fire safety, I wouldn't trust anything else. Highly recommended for anyone serious about home safety.

Works well easy to fit, good quality and value for money.

So far so good. They seem to be working fine. Easy to install, they look ok, are not too obvious or oversized. they do react when I burn the toast (which is more often than it should be) so that gives me some peace of mind.

This replaced a FireAngel SO-601 smoke alarm. It fits onto the old baseplate after a little time spent aligning the lugs and the alarm was activated as soon as it was fitted to the old baseplate. Great item, good price.

I bought two of these for family member and they have just had to smash up the second and final one at 3am in the morning because it kept going off for no reason. Despite cleaning, relocating etc it just kept happening. Same thing happened with the other one. It isnt the battery because these are non replaceable 10 yr batteries remember - and it was a full on alarm for no reason not a little battery chirp. Luckily these were only extra back up alarms and surplus to the other actual fire alarms so in the middle of the night they could take a hammer to it outside to shut it up! Disappointing from fire angel - used to be top quality, what happened?

Good value easy to install

These are great.

Good quality