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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PROCELL Duracell Duracell Alkaline Batteries, 9V, 12/Box

PROCELL Duracell Duracell Alkaline Batteries, 9V, 12/Box

Product ID: 315834023

Details

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

⚡Reliable long-lasting energy

📦12-pack bulk supply

🔋9V high-capacity alkaline power

€ 115.56

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Description

⚡ Stay powered, stay ahead — never run out when it counts!

BULK PACK EFFICIENCY - 12 batteries in one pack to keep your workspace or home fully powered
COMPACT LIGHTWEIGHT - Only 1.6 ounces each, easy to store and handle without bulk
POWER UP WITH 9 VOLTS - Consistent, high-voltage alkaline performance for your critical devices
VERSATILE COMPATIBILITY - Perfect for radios, smoke detectors, and all 9V battery-powered essentials
TRUSTED DURACELL QUALITY - Industry-leading reliability with a 4.7-star rating from over 1,500 users

Duracell Procell 9V Alkaline Batteries come in a convenient 12-pack, delivering reliable 9-volt power with proven Duracell quality. Each lightweight battery ensures long-lasting energy for professional and home devices, backed by a strong customer satisfaction rating.

Specifications

Antenna Location	Radio
Asin	B00009V2QZ
Battery Capacity	9 Volts
Battery Cell Type	Alkaline
Battery Weight	1.6 Ounces
Best Sellers Rank	#10,347 in Electronics (See Top 100 in Electronics) #296 in Disposable Household Batteries
Brand	PROCELL
Customer Reviews	4.7 4.7 out of 5 stars (1,549) 4.7 out of 5 stars
Global Trade Identification Number	00041333002408, 00041333116402, 00041333526485, 00638458747033, 00792679619347, 00800011194459, 06213759971529, 07133363448929
Included Components	Duracell Procell 9V Batteries, Pack of 12 (Packaging May Vary)
Item Dimensions	11.4 x 5.1 x 5.1 centimeters
Item Type Name	Duracell Procell 9V Batteries, Pack of 12 (Packaging May Vary)
Item Weight	1.6 Ounces
Manufacturer	manufacturer: Energycell
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
Unit Count	12 Count
Upc	792679619347 041333526485 800011194459 041333002408 638458747033 041333116402
Voltage	9 Volts

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€ 115.56

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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