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FireAngel CO-9X review

£19.00 Typical price

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Expert review

If you’re looking for a device that needs minimal maintenance, then the FireAngel CO-9X Carbon Monoxide Alarm may well catch your eye. It has a sealed battery, which means you won’t have to replace the batteries during its seven-year lifetime. We’ve tested its detection of killer carbon monoxide in a series of stringent lab tests back in 2016 to see if it pairs convenience with the quick reactions you need to keep you and your family safe in an emergency. Read on for the results of our tests.

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Last checked by Which?

January 2022

First reviewed by Which?

August 2016

Released

January 2016

Test results

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

Find out how we test carbon monoxide detectors>
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Best Buys and Don't Buys
We have tested 24 carbon monoxide detectors and found that there are 10 Don't Buys and 14 Best Buys.
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Full Access first month £2.99, then £9.99 per month, cancel at any time

Put us to the test

Our Test Labs compare features and prices on a range of products. Try Which? to unlock our reviews. You'll instantly be able to compare our test scores, so you can make sure you don't get stuck with a Don't Buy.

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