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What are the best batteries for smoke detectors

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Smoke, Fire & Gas Detection

Smoke Alarms

Replacement Batteries

Replacement Batteries for Smoke Alarms

Alkaline batteries and lithium batteries are suitable for 9V smoke alarms and other 9V products. The 10 year long life lithium batteries last up to 5 times longer than alkaline batteries and up to 10 times longer than carbon-zinc batteries.

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GP Long Life Lithium Battery

  • Long life Lithium 9V battery
  • Suitable for smoke alarms and CO alarms
  • Capacity 800mAh

4.6 out of 5 stars

Save 21%

Now: £8.34 inc VAT

£6.95 ex VAT

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9V Duracell Industrial Alkaline Battery

  • 9V Alkaline Battery
  • Suitable for smoke alarms and 9V products
  • Low cost replacement battery

5 out of 5 stars

Save 10%

Now: £3.66 inc VAT

£3.05 ex VAT

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Energizer Ultimate Lithium AA Battery

  • 1.5V AA lithium batteries
  • The longest-lasting AA batteries available
  • Upgrade from standard alkaline AA batteries
  • Leak-free guarantee
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4.4 out of 5 stars

£2.99 inc VAT

£2.49 ex VAT

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Which 9V batteries last longest?

The Ultralife Lithium 9V easily outlasts the worlds most advanced alkaline batteries. Depending on use and device cutoff voltage, the Ultralife Lithium 9V battery can offer up to five times the capacity of a leading alkaline 9V.

Which 9V batteries last longest in smoke detectors?

These 3 9V batteries are the BEST for smoke detectors.
EN22 Energizer Industrial Alkaline 9V Battery..
1222 Eveready 1.5V Super Heavy Duty 9V Battery..
LA522 Energizer 9V Advanced Lithium Battery..

Are lithium batteries good for smoke detectors?

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.

Are lithium or alkaline batteries better for smoke detectors?

Alarms with traditional (alkaline) batteries are fine. But those batteries must be changed at least once a year—and you may experience a “chirping” sound when the batteries are dying, which will require your immediate attention for safety. Instead, we recommend you get alarms that have long-life lithium ion batteries.

Which 9V battery is better Energizer or Duracell?

When it comes down to the choice between Duracell and Energizer, there's no outright winner. Both brands use the best technologies and aren't significantly different in any other features. Whether you want to go with Duracell or Energizer is a matter of preference.

What battery do you put in a smoke alarm?

Keep your home and family safe with long-lasting power Duracell's 9V or Specialty batteries for smoke alarms. When it comes to something as important as a smoke alarm for your home, make sure you use reliable batteries.

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