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Battery CO alarm

Kidde COBD10 10-Year Battery Carbon Monoxide Alarm

A CO alarm on a sealed 10-year battery with a digital ppm display — it keeps working through an outage, which is exactly when a generator puts carbon monoxide near the house.

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Check price on Amazon — Kidde COBD10 Carbon Monoxide Alarm (opens in a new tab)(paid link)

Best for

Every level of the home and outside sleeping areas, before generator season

Specifications

PowerSealed 10-year lithium battery (not replaceable)
SensorElectrochemical CO
DisplayBacklit CO ppm readout with peak-level memory
Alarm85 dB at 10 ft
StandardMeets UL 2034
MountingWall or tabletop
Warranty10-year limited

Specifications as published by Kidde. Confirm against the current spec sheet before buying — manufacturers revise models without renaming them.

What's good

  • Needs nothing from the grid — an outage can't silence it
  • Shows CO in ppm and remembers the peak, so an exposure while you slept is visible in the morning
  • The battery lasts the alarm's whole life — nothing to forget to replace

What's not

  • CO only — it does not detect smoke
  • The whole unit is replaced when it signals end of life at 10 years

Our verdict

CPSC's advice for generator season is a battery-operated or battery-backup CO alarm on every level of the home and outside sleeping areas, tested monthly. This one needs nothing from the grid for ten years, and the ppm display turns a vague headache into a number you can act on. It is a backstop, not permission: the generator still goes outside, at least 20 feet from the house, exhaust pointed away.

Check price on Amazon — Kidde COBD10 Carbon Monoxide Alarm (opens in a new tab)(paid link)

Compare with the alternatives

See the full outage safety roundup →