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A low battery is the most common cause of chirping smoke alarms, typically signaling every 30-60 seconds. In BC, we recommend changing batteries annually (e.g., during daylight savings) or sooner if needed. Use high-quality 9V or AA lithium batteries for longer life. Follow these steps for safe replacement:

Gather supplies: You'll need a stepladder, new batteries (match the type in your alarm), and possibly a screwdriver.

Silence the alarm temporarily: Press the hush/test button to stop chirping while you work.

Remove the cover: Twist the alarm counterclockwise off its base or open the battery compartment door by pressing the tab.

Extract the old battery: Gently pull it out, noting the positive (+) and negative (-) orientations.

Insert the new battery: Align the terminals correctly—positive to positive, negative to negative—and snap it in securely.

Reassemble and test: Close the compartment, remount the alarm, and press the test button for 5-10 seconds. It should emit a loud siren.

Reset if needed: If chirping continues, follow the reset steps above.

Pro tip: For hardwired alarms with battery backup (like our top-seller Kidde 30CUA10-VCA at $109.99), ensure the AC power is connected too. If changing batteries feels overwhelming or your alarms are outdated, our team handles battery changes as part of every service fee, with disposal included.

We recommend replacing your batteries semi-annually.

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