FA3820 Sealed Battery Carbon Monoxide Alarm

After nearly forgetting a portable CO detector on a cabin trip, I installed this FireAngel FA3820 unit in my bedroom and now travel with it. Setup took seconds: placed it upright on a shelf (free-standing) and later wall-mounted using the included bracket. The 10-year sealed battery was the key selling point – no battery anxiety.The Positives:The electrochemical sensor provides critical accuracy – it triggered a "ventilate" pre-alarm during a malfunctioning heater test (before dangerous levels accumulated). The 85dB alarm is piercingly loud (audible through closed doors) with a blinking red "CO" light for visual alerts. Alarm memory proved invaluable after a brief CO incident while I was out – the flashing light alerted me immediately upon returning home. The compact, lightweight design (95g) slips into luggage effortlessly – I’ve used it in Airbnbs, tents, and ferries. Third-party certifications (Kitemark/BSI) and CE/UKCA marks validate its reliability – non-negotiable for life-saving gear.Minor Considerations:- Wall-mounting requires precise placement (per manual) to avoid false alarms from dust/steam – my first attempt near a bathroom triggered unnecessary alerts.- No smart features like app alerts (expected at this price, but the core function is flawless).- "End-of-life" beeps are identical to low-battery chirps on other devices – could cause momentary confusion.Overall Experience:This detector inspires total confidence. The 10-year battery eliminates maintenance hassles, while the travel-friendly size ensures I never leave protection behind. It balances critical sensitivity with false-alarm prevention when positioned correctly. For homes and travel – especially with gas appliances or attached garages – it’s indispensable.Recommendation? An emphatic yes. Every household and traveler should own one.Final Thought: Uncompromising safety tech that’s earned permanent spots in my home and go-bag.

Good product. Easy to set up. Long battery life

So frustrating that a carbon monoxide alarm from the same manufacturer has different spacing for fixing to the wall. Apart from that it seems a good device and bought at a good price.

I fitted the FireAngel FA3820 carbon‑monoxide alarm the same afternoon it arrived—two screws into a joist above the wood‑burning stove and that was it. The sealed 10‑year battery means I’ll be stacking winters’ worth of logs before I even need to think about power, and the slim case feels sturdy enough to survive the odd knock when I heft kindling indoors.The first burn test was reassuringly loud: one press of the front button, three sharp beeps, and a bright red LED—exactly the jolt you want if the flue ever misbehaves. A long‑press triggers a full self‑check, so I can run it every month without climbing up to the attic detector like I used to.What I love most is its portability. I slip it into the glove box whenever we head to a holiday cottage with an open fire; takes thirty seconds to stick on the mantle with the spare adhesive pad and I can actually sleep instead of worrying about hidden vents.Bottom line: simple install, no‑maintenance battery, ear‑splitting alarm, and the freedom to take it on wood‑fired getaways. It’s a tiny investment for ten years of breathing easy.

These are incredibly important in protecting your family against potential carbon monoxide poisoning. Nice and small device and so far so good. Been several months (tend to review only after a while to ensure products are up to the job).It is not the loudest in the world but loud enough for you to hear. These won't blow your ears off. For me thats important with children but others may wish for a mains plug version or alternative if they want a louder alarm.Time will tell if the battery lasts ten years. In my experience the ten year sealed batteries usually fail before the ten year period so something to consider. These also only come with a 5 year warranty which says it all too but I liked the size, it is a reputable brand and I like the convenience of not changing the battery.In summary do consider these points and whether they are important to you prior to purchase or whether another CO alarm is better for you. For me I don't mind these points and it works as intended so far hence the 5 stars.

Working 💪 fine & exceptionally good value many thanks 😊

So easy to use,and looks good.Alarm really good

Easy to set up. Small so will sit easily on cupboard, tall boy, or other item of furniture top. Has a long life. The test beep worked. Hopefully there will be no gases for it to detect!