To determine if your combo alarm has reached its end-of-life, perform the following steps:
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When the alarm emits a quick beep every 30 seconds and the red LED flashes, you may need to replace the batteries.
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Replace the batteries.
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If the alarm continues to emit a quick beep every 30 seconds and the red LED flashes, it has reached the end-of-life and needs to be replaced.
If your alarm has reached its end-of-life, this is how you can dispose of it.