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Re: 2,3,4 wire smoke detectors?



> Do any 2 or 4 wire units have battery backup?

Technically, they all do.  The battery is in the alarm control panel.

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Regards,
Robert L Bass

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Bass Home Electronics
941-925-8650
4883 Fallcrest Circle
Sarasota · Florida · 34233
http://www.bassburglaralarms.com
=============================>



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