Why do smoke alarm chirp when they don't have battery?

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Why do smoke alarm chirp when they don't have battery

Jan 4th, 2016

Thank you for the opportunity to help you with your question!

The chirp  is to alert you that you need to put a battery in.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jan 4th, 2016

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