We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Kidde Long Life Carbon Monoxide Alarm 10LLCO review

Launched Reviewed

Try Which? for £1 to reveal the products that perform

Typical price


The clue is in the name of the Kidde Long Life Carbon Monoxide Alarm 10LLCO – it should last up to 10 years before you’ll need to replace it. Along the way you won’t even need to replace the batteries, which are safely sealed inside the unit. But does it pair this long life with the ability to detect even small concentrations of carbon monoxide in the air? We put the Kidde carbon monoxide detector through a series of gas detection tests to find out.
Is it worth your money?
Or is it a waste of cash?

The Which? difference

As well as thousands of impartial product reviews from our Test Labs, a Which? membership also gets you:

  • Unlimited access across which.co.uk
  • Advice on the move with our apps
  • Which? magazine delivered to your door
  • The inside scoop on important issues, from scams to savings accounts

Which? can help you make good decisions