First Alert

Model # SA340CN

Internet # 202433885

Battery Operated 10-Year Lithium Sealed Smoke Alarm

$18.87 /each

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Product Overview

The First Alert tamper resistant lithium battery powered alarm is proven to last at least 10 years without needing to replace power source. 10-year lithium power cells and tamper resistant design meet code regulations where required. No need to change the battery for the life of the alarm. Mute feature silences nuisance alarms from cooking smoke or shower steam. Single button also tests alarm functions. 10-year limited warranty. Meets UL standards.

  • 10-year lithium power cell lasts the life of the alarm
  • Ionization smoke sensor
  • Meets UL217 standard for smoke detectors
  • Tamper proof alarms are needed to meet local codes for rental properties
  • First Alert is America's most trusted brand in home safety

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 


Alarm Sensor Type 
Alarm Type 
Alarm/Detector Features 
10-Year Battery,Tamper Resistant 
Commercial / Residential 
Commercial / Residential 
Connector/Contact Type 
Power Source 
Voltage (volts) 

Warranty / Certifications

Certifications and Listings 
1-UL Listed 

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Customer Questions & Answers

2 Questions1 Answer

Customer Questions & Answers

Battery Operated 10-Year Lithium Sealed Smoke Alarm
Battery Operated 10-Year Lithium Sealed Smoke Alarm

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Can these batteries be replaced?

This question is from Battery Operated 10-Year Lithium Sealed Smoke Alarm
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March 24, 2016
If the batteries can be replaced where are they purchased?
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Answer (1)

Asked by
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April 9, 2016
Don't believe so. It's a battery pack, not a standard AA or 9v battery. Good for 10 years, or so they say.
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Does this smoke detector with 10-year Lithium battery meet the California SB 745? Commencing January 1, 2015, all new smoke alarms or combination smok

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September 10, 2015
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Customer Reviews

Rated 3.4 out of 5 by 19 reviewers.
Rated 5.0 out of 5.0 by good deal Easy to install tested and worked just as advertised February 23, 2016
Rated 5.0 out of 5.0 by A great purchase, no more need to replace batteries for ten year It would be better if they like every other manager does use screw holes rather than those wacky slots that you practically need 3 hands to install the base. A number of holes in different location so that it can be properly aligned. January 19, 2016
Rated 1.0 out of 5.0 by NOT A 10 YEAR BATTERY Installed this "10 year life" lithium battery alarm in July of 2013. It is September, 2015 and the stupid alarm is going off every 15 minutes because of low battery. Took the alarm off the wall and took the battery out. Will replace with another brand. Ridiculous. September 19, 2015
Rated 1.0 out of 5.0 by 10 year battery? So how come they only last 5 years? Perhaps it should be called a 5 year battery. September 12, 2015
Rated 1.0 out of 5.0 by bad battery I agree with other reviewers on the battery life. Ours lasted 3 months before the 10-year battery died and the unit started chirping at 5am-- we had bought this unit just so this wouldn't happen for some years. We'll be looking for another more reliable brand, or going back to the replaceable battery models. May 31, 2015
Rated 5.0 out of 5.0 by great easy to install handy to read looks reliable and dependable February 25, 2015
Rated 4.0 out of 5.0 by Reliable alarm, but battery life is highly variable. I have four of these installed, and one just gave me the beep alert that the batteries had died, This, after 3 years and 2 months. The others seem to be going along fine, testing okay and still rendering loud and clear alarm signals. So I conclude that the batteries in these alarms are a lot like light bulbs - they can last a long time, or go out prematurely - and you never know. It would probably be more honest if this product was billed as an an "UP TO 10 year alarm." Still, I don't mind replacing after over three years. September 12, 2013
Rated 1.0 out of 5.0 by 6 months... then it goes off anytime Poor deal, if you take an extra long shower, turn on the shower heater, or look cross-eyed at it, it screams November 6, 2014
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