Asked by: Uberney Hefner
home and garden smart home

How often should you change smoke detector batteries?

Last Updated: 2nd January, 2020

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According to the U.S. Fire Administration (USFA), smoke detectors should be tested at least once a month and batteries should be replaced at least once or twice a year.

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Hereof, how long does a 9 volt battery last in a smoke detector?

10 years

Subsequently, question is, do you really need to replace smoke detectors every 10 years? Smoke alarm lifespans can vary, but according to the association, smoke alarms need to be replaced at least every 10 years. According to Carli, that lack of awareness means some U.S. homes may have smoke alarms that have passed their expiration dates, putting people at increased risk in the event of a home fire.

Additionally, how long do AA batteries last in smoke detectors?

The same reliability that comes from our smoke and carbon monoxide alarms can now be found in our two year power supply - a AA battery that's guaranteed to power a Kidde smoke alarm or carbon monoxide alarm for 2 years or we will replace it.

What is the best 9 volt battery for a smoke detector?

1. EN22 Energizer Industrial Alkaline 9V Battery. The industry favorite 9-volt battery for battery-operated smoke alarms from a mega-brand – this is one of the very best 9v batteries for smoke detectors.

Related Question Answers

Lissa Alfano

Professional

Christeen Mebius

Professional

Do you need a special battery for a smoke detector?

Generally, most smoke detectors use a 9-volt battery for power, though you should always follow the directions that came in your smoke detector manual. Be sure the battery is new so that it lasts the full ten-year life expectancy of most home smoke detectors.

Lenora Liebanes

Professional

Why does my smoke detector keep beeping even after I change the battery?

If you have changed the battery in your chirping smoke detector and it still chirps, you might think your detector is bad. With the battery removed, press and hold the test button for 15-20 seconds. Replace the new battery in the detector and plug in the power supply. Restore power to the circuit breaker.

Khaoula Cloquell

Explainer

Which battery lasts the longest Duracell or Rayovac?

Rayovac batteries are consistently cheaper than Duracell and Energizer, while maintaining the high quality standards of name brand batteries. Shelf Life: Energizer batteries have a shelf life of up to 20 years for AA and AAA batteries and up to 10 years for the Energizer 9V battery.

Cyril Romi

Explainer

Rosangel Yuskevich

Explainer

Can a spider set off a smoke alarm?

Standard smoke alarms come in two basic flavors, ionization and photoelectric types. A spider, cockroach, other little creature, dust, aerosols, or yet other bits of foreign matter can disrupt either kind of detector and trigger an alarm. This is a good reason to keep these devices clean and in good working order.

Shuangyi Cooper

Pundit

Why does my smoke alarm go off when there is no smoke?

Why can smoke alarms go into alarm when no smoke is present? Any of these situations can cause unwanted alarms: Cover or Sensor Chamber is Covered by Dust or Dirt. Alarms may look clean, but dust can accumulate inside the cover, especially in newly built homes.

Angeline Middelborg

Pundit

Can I use a regular 9 volt battery in my smoke detector?

Most smoke alarms use 9-volt alkaline batteries, but some use AA. So if this is the first time you've replaced yours, do open the battery compartments on your units and check before heading to the store. You wouldn't want to waste that extra hour.

Ayram Worndl

Pundit

Why do smoke detectors use 9 volt batteries?

Modern products use CMOS ASICs. Photoelectric smoke detectors which operate on the basis of scattering of light are also used (because they detect certain types of fires better, and because of concerns about the radioactive sources ending up in landfills). 9V batteries are also used in this type of smoke detector.

Krzystof Lawther

Pundit

Can you use a lithium battery in a smoke detector?

A. Lithium 9Vs aren't recommended for smoke detectors unless you follow a strict battery replacement schedule. Those batteries maintain a high voltage until the end of their usable life, so they provide a much shorter “low battery” warning to alert you that it's time to swap in a fresh one.

Esclavitud Danyarov

Pundit

How do I know if my smoke detector needs a new battery?

Common Reasons for Smoke Alarms Chirping:
  1. Low Battery. As the battery in a smoke alarm gets weak, the smoke alarm will “chirp” about once a minute to let you know that the battery needs to be replaced.
  2. Battery is There but Part of the Terminal is Obstructed.
  3. Another Device or Appliance.

Chris Helmchen

Teacher

Are all 9 volt batteries the same?

Are all 9V batteries the same? No, unfortunately there are very small differences in size of 9 volt batteries, even in brand name 9v batteries such as Energizer (or Energizer Industrial) and Duracell (or Duracell Procell). However these standards still allow for varying in size for a 9 volt battery.

Gennaro Zimber

Teacher

How do you check a smoke alarm battery?

If you want to test a smoke detector, find the test button on the front or side of the unit. Push and hold the button for a few seconds to ensure the alarm sounds. If it doesn't, you may need to replace the batteries or have an electrician check the wiring in the detector.

Nefer Gil De Gomez

Teacher

Halyna Juhman

Teacher

Why do hardwired smoke detectors beep?

Most hard-wired smoke detectors include a 9-volt backup battery that's supposed to kick in if your home loses electricity. If that battery is running low, your detector alerts you with a high-pitched beep. Turn off power to your wired smoke detector at the circuit box. Find the battery cover panel on the detector.

Floy Komatsu

Reviewer

Do I need an electrician to replace hardwired smoke detectors?

They are hard-wired into our electrical system, but that doesn't mean you need an electrician to replace them. Modern hard-wired smoke detectors don't have wires in the back that need to be connected to loose wires in the ceiling. This connection makes it simple to replace bad or old smoke detectors with new ones.

Rosenda Teso

Reviewer

Why are smoke detectors only good for 10 years?

The radioactive isotopes decay and the ionization grows weaker - thus impairing the ability of the alarm to count as many particles. Environmental conditions can also impact lifetime. Smoke can build up on electrostatic plates (ionization type) and impair their ability.

Belia Kesper

Reviewer

Why do smoke alarms have to be replaced after 10 years?

After 15 years, the chances are better than 50/50 that your alarm has failed. That is too big a risk to take. Replacing alarms after 10 years protects against the accumulated chance of failure, but monthly testing is still your first, best means of making sure your alarm will work.

Az Ceño

Supporter

When did they start putting dates on smoke detectors?

Statitrol sold its invention to Emerson Electric on 1980 and Sears retailers began selling the units nationwide with a, “now required in every home” campaign. The first national standard for smoke detectors, now more commonly referred to as smoke alarms emerged in 1967.