Is this a good choice for smoke detectors?

It depends on whether your smoke detector is wired into the house wiring and the battery is just a backup, or if the battery is the only power source. If the battery is a backup to household power, a standard heavy duty (Non-alkaline) is best and also much cheaper, but needs to be replaced yearly. If the battery is the only power source, an alkaline battery like this is a good choice. Smoke detectors that are household wired and use the battery as a backup need a higher peak voltage to keep them from the occasional chirp sound that drives my dog crazy. A fresh/new heavy duty (non-alkaline) battery puts out over 10 volts and will easily last a year onder the light load of a smoke detector. A fresh/new alkaline battery will only put out about 9.4 - 9.5 volts, but it will handle a greater load for a longer time. My house wired smoke detectors start chirping at just under 9.4 volts, so my dog hates it if I use alkaline batteries in them.

Anybody know the mah rating of these?

The box nor battery have MaH. There are charts of their website for specs and usage, but no MaH. http://ww2.duracell.com/media/en-US/pdf/gtcl/Product_Data_Sheet/NA_DATASHEETS/PC1604_US_PC.pdf

what is the expiry date

The batteries I purchased in 1/2015 have a 3/2019 expiration date. It all depends on what seller you use.

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Duracell Procell Alkaline Batteries, 9V, 12/Box

Product ID: 91453767

Details

Battery capacity
9 Volts
Battery cell composition
Alkaline
Brand
PROCELL
Number of batteries
12 Product
Recommended uses for product
Watch

⏳7-year shelf life reliability

⚡9V high voltage power

📦Bulk pack of 12 batteries

€ 37.80

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Description

⚡ Stay powered, stay ahead – Procell never quits!

BULK BUY BULK SAVE - Economical 12-pack designed for professional and industrial use
LIGHTWEIGHT BUT MIGHTY - Compact 1.6 oz batteries that pack a powerful punch
TRUSTED PERFORMANCE EVERY TIME - Duracell Procell brand known for consistent, long-lasting power
POWER THAT LASTS EVEN IN STORAGE - Dependable 9V alkaline cells with up to 7 years shelf life
READY FOR ANY PROFESSIONAL CHALLENGE - Ideal for industrial applications requiring reliable energy

Duracell Procell 9V alkaline batteries come in a convenient 12-pack bulk package, delivering reliable, long-lasting power with a shelf life of up to 7 years. Engineered for professional and industrial use, these lightweight batteries ensure consistent performance for all your critical devices.

Specifications

ASIN	B00009V2QZ
Antenna Location	Watch
Battery Capacity	9 Volts
Battery Cell Type	Alkaline
Best Sellers Rank	6,091 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 640 in Disposable Household Batteries
Brand Name	PROCELL
Customer Reviews	4.7 4.7 out of 5 stars (1,550)
Global Trade Identification Number	00041333002408, 00041333116402, 00041333526485, 00638458747033, 00792679619347, 00800011194459, 06213759971529, 07133363448929
Item Dimensions	11.4 x 5.1 x 5.1 centimetres
Item Weight	1.6 Ounces
Manufacturer	PROCELL
Model Name	Duracell Procell 9V Batteries, Pack of 12 (Packaging May Vary)
Model Number	PC 1604
Number of Batteries	12 Product Specific batteries required.
Reusability	Single Use
UPC	792679619347 041333526485 800011194459 041333002408 638458747033 041333116402
Voltage	9 Volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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€ 37.80

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Ireland.

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TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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Customer service was outstanding when I had questions about the product.

2 days ago

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