First Alert SA700 Long Life No Nuisance Smoke Alarm review
Test score %
- Smoke alarm
- Battery only
- Optical smoke alarm
The First Alert SA700 Long Life No Nuisance smoke alarm comes with a 10-year sealed battery, so you won’t need to replace the batteries for this alarm’s lifetime. It comes with a hush button to use for weekly testing, but how good is it at detecting smoke in an emergency? To find out, we took it to our test lab. Our First Alert smoke alarm review reveals how well it detects smoke in your home.
- Pros and cons
Technical specifications
General
Test results
The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.
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- 0%Lowest score
- 43%Average score
- 93%Highest score
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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