Replace Smoke and CO Detector Batteries
Replace batteries in all smoke and carbon monoxide detectors twice a year.
DIY Cost
$20
If Ignored
$0
Frequency
Twice a year
Difficulty
Easy DIY
Most homeowners can handle this in under an hour with basic tools.
How to do it โ step by step
Replace batteries in all smoke and CO detectors when clocks change in spring and fall (use this as your reminder). Use quality alkaline batteries โ avoid rechargeables. Press the test button after replacement. Any detector more than 10 years old should be fully replaced (check the date on the back). Interconnected detectors (wired or wireless) ensure all alarms sound when one triggers. CO poisoning kills 400 Americans annually โ a working detector is your only warning before symptoms appear.
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