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Best Buy customers often prefer the following products when searching for batteries smoke alarms.

Smoke detectors are a crucial part of fire safety. They're also a crucial part of your home's electrical system, and you should be concerned about what kind of batteries you're using. Most smoke detectors run on 9-volt batteries, but there are two different types: alkaline and lithium. Either way, here is a selection of batteries that can replace the existing supply in your smoke alarm.

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  1. Panasonic - eneloop Rechargeable AA Batteries (12-Pack) - Front_Zoom
    Top comment

    "Great rechargeable batteries....We must have a hundred of these in our house in smoke detectors, professional photography equipment, smoke alarms, toys, etc. ...battery...They are good long lasting batteries for a good price."

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    Product Description

    Power your household electronics easily with these Panasonic eneloop BK-3MCCA12SA AA batteries, which come precharged for immediate use and can be recharged up to 2100 times for a long-lasting design. The batteries withstand the cold for versatility.
    See all Rechargeable Batteries
    Top comment

    "Great rechargeable batteries....We must have a hundred of these in our house in smoke detectors, professional photography equipment, smoke alarms, toys, etc. ...battery...They are good long lasting batteries for a good price."

    See all customer reviews

    Product Description

    Power your household electronics easily with these Panasonic eneloop BK-3MCCA12SA AA batteries, which come precharged for immediate use and can be recharged up to 2100 times for a long-lasting design. The batteries withstand the cold for versatility.
    See all Rechargeable Batteries
    See all Rechargeable Batteries
  2. Best Buy essentials™ - C Batteries (4-Pack) - Alt_View_Zoom_11
    Top comment

    "Battery...Batteries are batteries, what can I say except they work.....Batteries...Maybe no one uses for smoke alarms anymore"

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    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BC4PK C Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline C batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 7,500 mAh capacity and 1.5 V of power, ensuring your toys, instruments, flashlights and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Battery...Batteries are batteries, what can I say except they work.....Batteries...Maybe no one uses for smoke alarms anymore"

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    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BC4PK C Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline C batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 7,500 mAh capacity and 1.5 V of power, ensuring your toys, instruments, flashlights and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  3. Energizer - MAX 9V Batteries (4 Pack), 9 Volt Alkaline Batteries - Front_Zoom
    Top comment

    "Needed it for smoke alarm!...I needed these for a smoke alarm. I’m glad Best Buy has them....smoke alarm...Satisfied up to now used these for my smoke alarm batterys although one of these stopped working for some reason"

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    Product Description

    Energizer MAX 9V Alkaline Batteries are all about long lasting power for your everyday devices. Made to last, not to leak, these Energizer batteries fuel the technology that helps you live, work and play. Use these Energizer 9 volt batteries to power a variety of everyday gadgets and household items, whether you need smoke detector batteries, remote control car batteries, or 9V batteries for your child's favorite toys and games. With a shelf life of up to 5 years, these batteries are ready to keep your devices operating when you need them most. Depend on Energizer MAX 9 volt alkaline batteries to fuel your everyday electronics, whether you're at home, work or play.
    See all Alkaline Batteries
    Top comment

    "Needed it for smoke alarm!...I needed these for a smoke alarm. I’m glad Best Buy has them....smoke alarm...Satisfied up to now used these for my smoke alarm batterys although one of these stopped working for some reason"

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    Product Description

    Energizer MAX 9V Alkaline Batteries are all about long lasting power for your everyday devices. Made to last, not to leak, these Energizer batteries fuel the technology that helps you live, work and play. Use these Energizer 9 volt batteries to power a variety of everyday gadgets and household items, whether you need smoke detector batteries, remote control car batteries, or 9V batteries for your child's favorite toys and games. With a shelf life of up to 5 years, these batteries are ready to keep your devices operating when you need them most. Depend on Energizer MAX 9 volt alkaline batteries to fuel your everyday electronics, whether you're at home, work or play.
    See all Alkaline Batteries
    See all Alkaline Batteries
  4. Best Buy essentials™ - Assorted Batteries with Storage Box (33-Pack) - Alt_View_Zoom_11
    Top comment

    "Since most people use those in their smoke detectors it seems like others would like more too....But only one 9v battery (I needed 4 just for the fire alarms in my ceilings, and they are in everything from bathroom scales to mini-speakers; it would be useful to have a half-dozen on hand.)"

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    Product Description

    They’re just batteries—until your electronics need power. The Best Buy essentials BE-BMULTIPK Assorted Batteries with Storage Box (33-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This alkaline battery kit contains AA batteries (12), AAA batteries (12), C batteries (4), D batteries (4) and a 9 V battery, providing you with more than enough backups for when you need them. Safe and environmentally friendly, they are also mercury and cadmium free. The batteries also come in an included storage box, keeping them neatly stored and organized. Be prepared for the next time you need power with alkaline batteries Backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Since most people use those in their smoke detectors it seems like others would like more too....But only one 9v battery (I needed 4 just for the fire alarms in my ceilings, and they are in everything from bathroom scales to mini-speakers; it would be useful to have a half-dozen on hand.)"

    See all customer reviews

    Product Description

    They’re just batteries—until your electronics need power. The Best Buy essentials BE-BMULTIPK Assorted Batteries with Storage Box (33-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This alkaline battery kit contains AA batteries (12), AAA batteries (12), C batteries (4), D batteries (4) and a 9 V battery, providing you with more than enough backups for when you need them. Safe and environmentally friendly, they are also mercury and cadmium free. The batteries also come in an included storage box, keeping them neatly stored and organized. Be prepared for the next time you need power with alkaline batteries Backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  5. UltraLast - 9V Batteries (12-Pack) - Front_Zoom

    Model: UL129VB
    SKU: 5894045
    Top comment

    "Bought these for our smoke alarms that are hardwired with battery backup. ...Use these batteries in my home smoke alarm and my remote garage door opener. "

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    Product Description

    Keep toys and gadgets running smoothly with these UltraLast 9V batteries. This pack includes 12 alkaline cells, so you can stock the supply room or gadget drawer.
    See all Alkaline Batteries
    Top comment

    "Bought these for our smoke alarms that are hardwired with battery backup. ...Use these batteries in my home smoke alarm and my remote garage door opener. "

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    Product Description

    Keep toys and gadgets running smoothly with these UltraLast 9V batteries. This pack includes 12 alkaline cells, so you can stock the supply room or gadget drawer.
    See all Alkaline Batteries
    See all Alkaline Batteries
  6. Best Buy essentials™ - 9 V Batteries (4-Pack) - Front_Zoom
    Top comment

    "Smoke Alarm Battery...Great day for Smoke Alarm battery. You can't get 4 battery anywhere else for this price....Great for smoke alarm...These batteries work. Great for smoke alarm. Also toys."

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    Product Description

    They’re just batteries – until your electronics are powerless. The Best Buy essentials BE-B9V4PK 9 V Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline 9 V batteries, ensuring you always have backups when you need them. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 500 mAh capacity and 9 V of power, ensuring your remote controls, alarms and other electronics are ready to go. Be prepared for the next time you need power with alkaline batteries Backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Smoke Alarm Battery...Great day for Smoke Alarm battery. You can't get 4 battery anywhere else for this price....Great for smoke alarm...These batteries work. Great for smoke alarm. Also toys."

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    Product Description

    They’re just batteries – until your electronics are powerless. The Best Buy essentials BE-B9V4PK 9 V Batteries (4-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 4 alkaline 9 V batteries, ensuring you always have backups when you need them. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 500 mAh capacity and 9 V of power, ensuring your remote controls, alarms and other electronics are ready to go. Be prepared for the next time you need power with alkaline batteries Backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  7. Best Buy essentials™ - AA Batteries (8-Pack) - Alt_View_Zoom_11
    Top comment

    "Batteries...Batteries they are good for clocks, remotes, toothbrush, shavers, fire alarms, flash lights...Good batteries at a fraction of the pice. Unless you need batteries for a smoke detector or something like that, get these."

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    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BAA8PK AA Batteries (8-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 8 alkaline AA batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 2,900 mAh capacity and 1.5 V of power, ensuring your toys, remote controls, cameras and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Batteries...Batteries they are good for clocks, remotes, toothbrush, shavers, fire alarms, flash lights...Good batteries at a fraction of the pice. Unless you need batteries for a smoke detector or something like that, get these."

    See all customer reviews

    Product Description

    They’re just batteries – until your remote control is dead. The Best Buy essentials BE-BAA8PK AA Batteries (8-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 8 alkaline AA batteries, ensuring you have enough to power your device. Safe and environmentally friendly, they are also mercury- and cadmium-free. They deliver a long-lasting and reliable charge with a 2,900 mAh capacity and 1.5 V of power, ensuring your toys, remote controls, cameras and other electronics are ready to go. Keep your favorite electronics powered with alkaline batteries backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  8. Best Buy essentials™ - CR123 Batteries (6-Pack) - Alt_View_Zoom_11
    Top comment

    "Batteries...Works like it suppose to in our smoke alarm. Once we put in the battery the alarms ceased....Battery...What I needed was perfect replacement for my smoke alarm"

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    Product Description

    They’re just batteries – until your keyless entry is dead. The Best Buy essentials BE-B1236PK CR123 Batteries (6-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 6 lithium CR123 batteries, providing you with enough backups for when you need them. They deliver a reliable charge with a 1,400 mAh capacity and 3 V of power, ensuring your keyless entries, glucometers, games and other compatible electronics are ready to go. Be prepared for the next time you need power with batteries Backed by Best Buy.
    See all Alkaline Batteries
    Top comment

    "Batteries...Works like it suppose to in our smoke alarm. Once we put in the battery the alarms ceased....Battery...What I needed was perfect replacement for my smoke alarm"

    See all customer reviews

    Product Description

    They’re just batteries – until your keyless entry is dead. The Best Buy essentials BE-B1236PK CR123 Batteries (6-Pack) deliver consistent power to a wide variety of compatible toys and electronics. This pack contains 6 lithium CR123 batteries, providing you with enough backups for when you need them. They deliver a reliable charge with a 1,400 mAh capacity and 3 V of power, ensuring your keyless entries, glucometers, games and other compatible electronics are ready to go. Be prepared for the next time you need power with batteries Backed by Best Buy.
    See all Alkaline Batteries
    See all Alkaline Batteries
  9. Energizer - Ultimate Lithium AAA Batteries (2 Pack), Triple A Batteries - Front_Zoom
    Top comment

    "batteries...These are good batteries. I use them for a paging alarm with two way communication these seem to last longer than other brands....best for smoke alarms...After coming home one March, our house was on the verge of freezing! Our batteries had run out . These batteries have never let us down."

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    Product Description

    Experience lasting performance with Energizer Ultimate Lithium AAA Batteries. These household batteries are not only the #1 longest lasting AAA batteries in high-tech devices, but they also feature leak resistant construction and superior performance in extreme temperatures ranging from -40 degrees F to 140 degrees F. Use these AAA lithium batteries to power a variety of high tech and household items, whether you need batteries for flashlights, game controllers, digital cameras, or your child's favorite toys and games. Ultimate Lithium Energizer AAA batteries weigh one-third less than standard alkaline triple A batteries, making them a lightweight power source. Energizer Ultimate Lithium batteries also hold power for up to 25 years in storage, letting you keep a ready supply of backup batteries. To ensure your favorite devices operate at their peak performance, depend on Energizer Ultimate Lithium batteries for work, play and home.
    See all Lithium Batteries
    Top comment

    "batteries...These are good batteries. I use them for a paging alarm with two way communication these seem to last longer than other brands....best for smoke alarms...After coming home one March, our house was on the verge of freezing! Our batteries had run out . These batteries have never let us down."

    See all customer reviews

    Product Description

    Experience lasting performance with Energizer Ultimate Lithium AAA Batteries. These household batteries are not only the #1 longest lasting AAA batteries in high-tech devices, but they also feature leak resistant construction and superior performance in extreme temperatures ranging from -40 degrees F to 140 degrees F. Use these AAA lithium batteries to power a variety of high tech and household items, whether you need batteries for flashlights, game controllers, digital cameras, or your child's favorite toys and games. Ultimate Lithium Energizer AAA batteries weigh one-third less than standard alkaline triple A batteries, making them a lightweight power source. Energizer Ultimate Lithium batteries also hold power for up to 25 years in storage, letting you keep a ready supply of backup batteries. To ensure your favorite devices operate at their peak performance, depend on Energizer Ultimate Lithium batteries for work, play and home.
    See all Lithium Batteries
    See all Lithium Batteries
  10. Energizer - 123 Lithium Batteries (4 Pack), 3V Photo Batteries - Front_Zoom
    Top comment

    "Used for alarm...These batteries were used as replacement batteries for a smoke alarm....Great batteries for our smoke alarms. I change all smoke alarm batteries once a year."

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    Product Description

    Energizer 123 Lithium Photo Batteries deliver reliable performance for your high tech devices. Place these powerful batteries in your cameras, and capture that perfect photo or video without worrying about your batteries running low. Lithium 123 batteries are also a long lasting, dependable choice when you need flashlight batteries or replacement batteries for your smart home devices. Energizer 123 lithium batteries last up to 10 years in storage, letting you keep a ready supply available when you need them. Count on Energizer lithium batteries to ensure your high tech devices stay powered and ready to capture precious memories.
    See all Camera Batteries & Power
    Top comment

    "Used for alarm...These batteries were used as replacement batteries for a smoke alarm....Great batteries for our smoke alarms. I change all smoke alarm batteries once a year."

    See all customer reviews

    Product Description

    Energizer 123 Lithium Photo Batteries deliver reliable performance for your high tech devices. Place these powerful batteries in your cameras, and capture that perfect photo or video without worrying about your batteries running low. Lithium 123 batteries are also a long lasting, dependable choice when you need flashlight batteries or replacement batteries for your smart home devices. Energizer 123 lithium batteries last up to 10 years in storage, letting you keep a ready supply available when you need them. Count on Energizer lithium batteries to ensure your high tech devices stay powered and ready to capture precious memories.
    See all Camera Batteries & Power
    See all Camera Batteries & Power
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