How long do batteries last?

Using the batteries that came with mine, it went 275 days before the "batteries need changing" beeping started.

Advice on false alarms? Goes off every week or so. It's in our kitchen/living room, but goes off even when we are not cooking. Goes 1 min then stops..

I have this model and it always goes off. Every time someone takes a shower, or even when cooking and no smoke. I also have a fog machine now for Halloween and it goes crazy. I'm currently researching a different model because this one drives me crazy.

I have these througout my house and rental unit. Installed them about 7 years ago and many malfunctioning. Any durability mprovments since 7 yrs ago?

bought mine in Dec2017. It says 7 year warranty on this unit, so I'll see. Many CO detectors are only 5 yrs, but you can find higher quality ones (not avail on Amazon) that are good for 10 yrs and have dual sealed non-replaceable batteries (so install and forget for a decade). I bought this because it does both CO & smoke. I have a CO detector by our bedrooms that displays CO readings in real time above 11ppm, which is superior to this. Even low levels of CO is hazardous, and govt regs specify an alarm to sound only if >30ppm, not lower levels.

Can the voice part not be used (says programmable)? alarm/beep only?

I really wish it were. No, it will always use the bellowing voice. You can program which area the device is in, such as hallway or bedroom so the alarm will identify where the trouble is. Read the reviews carefully and believe them when they say it goes of randomly in the early hours and runs its test mode at 3am. I literally threw mine down the street at 3am after it went off for no reason the 4th night in a row.

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First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack

First Alert SMCO100 Battery-Operated Combination Smoke & Carbon Monoxide Alarm, 1-Pack

Product ID: 255571302

Details

Brand
First Alert
Colour
White
Power source
Battery
Product dimensions
14.2D x 14.2W
Style
Standard with

🔋Battery-powered, easy install

🔥Precision Detection tech

🛡️2-in-1 Smoke & CO protection

€ 116.14

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Stay ahead of danger with smart, silent protection.

END OF LIFE ALERT - Know exactly when it’s time to replace your alarm, ensuring continuous protection without guesswork.
DUAL THREAT DEFENSE - Reliable 2-in-1 smoke and carbon monoxide detection keeps your home safer with one sleek device.
SMART TEST SILENCE BUTTON - Quickly test functionality or silence nuisance alarms with a single press, saving time and stress.
HASSLE FREE BATTERY OPERATION - Battery-powered design means no wiring—install anywhere, maintain effortlessly.
CUTTING EDGE PRECISION DETECTION - Advanced sensors reduce false alarms from cooking, so you stay alert only when it matters.

The First Alert SMCO100 is a battery-operated combination smoke and carbon monoxide alarm featuring advanced Precision Detection technology to minimize false alarms. It offers reliable dual protection, easy installation without wiring, a convenient test/silence button, and an end-of-life warning to keep your home continuously safe.

Specifications

ASIN	B0CKTZ4GVW
Alarm	Smoke, CO
Best Sellers Rank	#44,234 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #49 in Smoke Alarms
Brand	First Alert
Built-In Media	AA Batteries
Color	White
Colour	White
Customer Reviews	4.6 out of 5 stars 659 Reviews
Global Trade Identification Number	00029054022066
Item Dimensions D x W x H	14.2D x 14.2W x 4.8H centimeters
Item Type Name	Combination Alarm
Item Weight	0.52 Pounds
Item weight	0.52 Pounds
Manufacturer	Resideo
Mfr Part Number	1046776
Model Number	SMCO100
Number of Items	1
Power Source	Battery Powered
Power source	Battery Powered
Product Style	Standard Profile with Audible Alert
Product dimensions	14.2D x 14.2W x 4.8H centimeters
Sensor Type	Photoelectric
Style	Standard Profile with Audible Alert
UPC	029054022066
Unit Count	1 Count

Reviews

S**D

ممتاز

منتج رائع وجودة عاليه جدا

13.11.2024

V**Y

Rookmelder

Was dik in orde.

26.01.2026

E**N

Recensie

Correct product. Snelle levering.

6.12.2025

A**R

Work as it's designed to.

Might go off if your frying fish without a cover on the pan.

15.06.2026

A**R

Works great!

Works how it should! Easy set up

12.06.2026

A**.

Fine product

Works as advertised

28.05.2026

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