Product images: Amazon listings
Written from the listing's specs, not from our own use · How we rate
The First Alert Battery CO Alarm is a CO alarm built around smoke and CO in one unit. A good match for any house with a generator in the driveway, rated 7.3/10 on its documented specs.
| Brand | First Alert |
|---|---|
| Category | Covers, cords & accessories |
| ASIN | B000N8OYXI |
Full listing title: First Alert Battery Carbon Monoxide Alarm
Rated from the listing's specs, no buyer reviews yet
What it's made for: any house with a generator in the driveway.
Two CO alarms close to it on our rating, each with a dated price.
It runs on batteries, per the listing, so it keeps working while the power is out, which is exactly when the generator runs.
Put one on every sleeping floor and one near the door closest to where the generator sits. Push its button once before storm season and listen for the beep.
What the First Alert Battery CO Alarm listing names:
Check these figures against your generator's manual before you order.
On Sep 30, 2026, that price put it in the cheaper third of the 5 CO alarms we have a recent price for.
The button opens the exact listing (ASIN B000N8OYXI), where today's price, stock and seller apply.
Our take
The First Alert Battery CO Alarm is about smoke and CO in one unit, and it doesn't pretend to be more. No buyer reviews yet, so this First Alert CO alarm has to win you over on paper. Our main reservation: one alarm is not a plan; you want one on every sleeping floor. We'd pick it if you run a generator anywhere near the house; otherwise, put it next to the Kidde AA Battery CO Detector first.
Before you order the First Alert Battery CO Alarm, check where it will go: it runs on batteries, so it keeps working during the outage; place one near the door closest to the generator.
Find the full model number on your generator's label and compare it with the listing before you order.
One on every sleeping floor and one near the door closest to the generator. Our CO safety and placement guide covers placement.
How the First Alert Battery CO Alarm stacks up against the closest alternative, the Kidde AA Battery CO Detector.
| Criterion | First Alert Battery CO Alarm | Kidde AA Battery CO Detector |
|---|---|---|
| Our rating | 7.3/10 | 7.4/10 |
Pick the Kidde AA Battery CO Detector if you want our higher-rated option (7.4/10).
We rate it 7.3/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.
Only if your generator manual confirms it. Check the outlet or plug type, the amperage, the list of supported models and any adapter the manual asks for; looking similar is no proof that it fits.
Its listing states battery power, so it works in an outage. These are the seller's figures, not our measurements: whether it fits your exact generator is worth confirming first.
Your exact model: find the full model number on your generator's label and compare it with the listing before you order. Where it goes: one on every sleeping floor and one near the door closest to the generator. Our CO safety and placement guide covers placement.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula, plus our editors' read of how it compares with its rivals.