Kidde KN-COP-DP-10YL Plug-In Carbon Monoxide Alarm with 10-Year Battery Backup
A plug-in CO alarm with a sealed 10-year backup battery, a digital PPM readout and peak memory, so there is no backup battery to forget.
Updated
- Sealed 10-year lithium backup battery, no battery changes (Kidde)
- Digital display shows CO in parts per million and dims in low light
- Peak Level button shows the highest reading since the last reset
- 85 dB alarm at 10 feet, listed to UL 2034
- 10-year limited warranty and an end-of-life alert at 10 years
Best For / Not For
Best for
- Most homes that want one plug-in alarm per level with no battery upkeep
- Buyers who want to see the actual CO level, not just an alarm
- Outlets in either orientation, thanks to the rotating plug
Not for
- Rooms without a free outlet at a sensible height (look at the First Alert CO710)
- Homes that want alarms to set each other off or send phone alerts (it does not interconnect)
Key Details
Why the Sealed Battery Matters
A plug-in CO alarm only protects you during a power outage if its backup battery is present and charged, and outages are when many people run generators and other fuel-burning heaters. Kidde seals the backup battery inside the KN-COP-DP-10YL and rates it for the full 10-year life of the alarm, so there is nothing to replace and nothing to borrow for the TV remote.
Kidde lists this model as the replacement for its older KN-COPP-3 Nighthawk, which used a replaceable 9V backup. If you see both for sale, the newer one is the better buy.
What the Display Tells You
The LED readout shows the CO level in parts per million and the Peak Level button shows the highest level recorded since the last reset. That helps after a nuisance beep: a peak reading tells you whether CO really rose while you were out, which is useful information to give a technician or the gas company. The display dims in low light, so it is reasonable for a hallway near bedrooms.
Pros and Cons
Pros
- Sealed backup battery removes a common failure, a dead or missing backup battery
- PPM readout and peak memory make low or intermittent CO easier to spot
- Rotating plug keeps the alarm upright on vertical or horizontal outlets
- 10-year limited warranty, longer than the 7 years First Alert gives the CO615
Cons
- Plugs straight into the wall with no cord, so placement depends on where your outlets are
- The display turns off during a power outage to save the battery; the alarm still works
- No interconnect and no smart features
Bottom Line
Buy the Kidde KN-COP-DP-10YL if you want a plug-in CO alarm you can install and leave alone for a decade. The sealed backup battery, PPM display and peak memory cover what most homes need. Pick the First Alert CO710 instead for rooms without a usable outlet.
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