Mains powered is the way to go...

sod that. Had battery ones and had four all decide to beep on the same night.

Posted By: Pixelman, Jul 14, 06:59:30

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2
even mains powered smoke alarms have batteries
Posted By: ghostof barry butler, Jul 14, 08:49:35
I guess on balance a chirping alarm every 4 years
Posted By: Captain Bligh, Jul 14, 07:27:24
1
They still have battery back ups don’t they? In case the fire takes out the power
Posted By: Old Git, Jul 14, 07:24:13

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