Model # SA305CN3

Internet #202433884

First Alert Battery Operated Long Life Lithium Smoke Alarm

First Alert

Battery Operated Long Life Lithium Smoke Alarm

  • Long-life lithium battery
  • EZ access battery door
  • Batteries Included
$12.90 /each

Frequently Bought Together

Product Overview

First Alert smoke alarm with long-life lithium battery. Long life lithium battery reduces costly battery replacement and frequent maintenance. Mute feature silences nuisance alarms. Single button tests detector functions. Easy access front loading battery door: no need to remove alarm from ceiling to change battery. Ideal for Hallways, Bedrooms and Living areas especially in hard to reach locations. 10-year limited warranty. Meets UL standards.

  • 9-Volt removable long life lithium battery
  • Mute button
  • EZ access battery door
  • Optional theft-prevention lock to secure the detector
  • Ionization smoke sensor
  • Long life lithium battery included
  • Loud 85 dB alarm
  • 10-year limited warranty
  • Meets UL217 standard
  • America's most trusted brand in home safety

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

To have our rental properties up to code we need ten-year sealed lithium battery smoke detectors....

To have our rental properties up to code we need ten-year sealed lithium battery smoke detectors. Other brands say their batteries are sealed, but this one does not. Are they sealed?
Asked by: stacy
The description says that the battery is "removable". So, it is not sealed.
Answered by: Jacob
Date published: 2017-02-28

Can l install without screws

Asked by: john
No, the alarm needs screws to mount properly.
Answered by: CommunityAnswer
Date published: 2016-01-28

Where do I get a 9 volt lithium battery

Asked by: BMC
Thank you for your recent inquiry with The Home Depot, BMC. You can view the 9 volt lithium batteries we carry here: We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
Answered by: THDSupport
Date published: 2016-01-29

Can you use together smoke alarms that are all First Alert lithium battery alarms but have 2 different model numbers?

Asked by: Gerrie
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Customer Reviews

Battery Operated Long Life Lithium Smoke Alarm is rated 3.8 out of 5 by 12.
Rated 1 out of 5 by from Picture does not represent the item I ordered 6 of these for my house. When they came they were clearly the wrong unit. No safety light and it comes with a lithium battery but no promise of 10 year life on the battery. I called the 800 number and the operator apologized and reordered the units for me. The new units came today and they are still missing the safety light and again no promise of 10 year battery life. I installed 2 of the units as I didn't want to go any longer without working smoke detectors in the house. They seem to work great but I really liked the idea of having a safety light and the price was reasonable. Not sure it I'll use the the other 4 yet or look for something different. Just wanted to let everyone know you won't be getting what you order if you order this item.
Date published: 2015-10-14
Rated 5 out of 5 by from set it up and forget it. replaceable 10 year battery. lithium 9 volt style. just need to test once a year. we test twice a year on the time change dates. we just replaced the previous model with this one. it lasted 15 years with now working problems wanted the same thing. been in place now for 60 days with no issues. easy to install right in the place of the previous 10 year version.
Date published: 2013-03-12
Rated 2 out of 5 by from Fussy battery tray The battery tray hinges out for battery installation. Unfortunately the detent is too high, and it is very hard to close the battery tray. The trick is to firmly press the battery down into the tray while simultaneously pushing the tray into the smoke alarm. Because the hush tab on the outside is also used to test the battery, it will NOT make a sound when you press it. It will illuminate a red light inside the alarm that indicates the battery is good. Don't throw the battery out thinking it has discharged. Also, there is no visible plus sign in the battery tray to indicate which way to orient the battery. Note the slightly larger slit in the battery tray wall - that is the slit the plus terminal goes through.
Date published: 2015-10-13
Rated 5 out of 5 by from Great product Worked very well and easy to install. Saved a lot of money buying these online.
Date published: 2016-01-05
Rated 5 out of 5 by from Everything was as I had hoped Nice that the mountain ring is the same as the old units being replaced. Made for VERY EASY installation
Date published: 2013-10-15
Rated 2 out of 5 by from Bought three, one works I chose this smoke alarm because I have been happy with my three electrician installed ones. I bought three more for the rest of the house but only one of them works. There is something wrong with the battery doors which make it difficult to install the battery. Once the battery is finally in place the test alarm does not engage. I am returning the defective ones and regretfully looking at other brands.
Date published: 2015-02-03
Rated 5 out of 5 by from first alert smoke alarm alarm was a great price first alert is a good name in security products the one I replaced was a first alert it was long over due for replacement
Date published: 2015-03-10
Rated 5 out of 5 by from Great product The smoke alarm was easy to assemble and put up,and is a good value.
Date published: 2016-02-10
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