Battery Powered 2-in-1 Combination Smoke and Carbon Monoxide Alarm, SMCO100
Smoke and CO in one alarm on two AA batteries, for the sleeping areas and levels with no outlet where a plug-in alarm cannot go.
By First Alert. Specs read from the maker on .
Price and stock: Maker product page (where to buy)
| Power | Two AA batteries (replaceable), no wiring |
|---|---|
| Sensors | Photoelectric smoke, electrochemical CO |
| Standards | UL 217 (smoke) and UL 2034 (CO), per the SMCO100 user's manual |
| Alarm | 85 dB at 10 feet |
| Life | Replace 10 years after installation; audible end-of-life signal |
| Warranty | 10-year limited |
| Interconnect | No (manual: battery operated alarms do not provide interconnected functionality) |
| Battery life | Not stated by the maker |
"Not stated by the maker" means the maker's pages do not say; this shelf leaves it blank rather than guess.
Know before you buy
The research candidate SCO5CN is discontinued on firstalert.com, which names the SMCO100 as its replacement. The SMCO100 product page does not name the UL standards; the user's manual (support.firstalert.com) does. The product page showed the item as backordered.
Where each spec was read
- Maker: SMCO100 product page read 2026-10-27
- Maker: SMCO100 user's manual (PDF) read 2026-10-27
- Maker: SCO5CN discontinued page (names replacement) read 2026-10-27
Read first
Every store link on this shelf goes to the maker's own page unless a note beside it says it is an affiliate link. The guides on winterize.house name no brand; only these shelf pages do. No maker pays for placement.
Notes drafted with a language model from the maker's pages and checked against them. Product information, not professional advice: for gas, electrical and roof work, hire someone licensed.
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