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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🔋 Power your professional edge with Duracell Procell — never run out when it counts!

POWER THAT LASTS - Duracell Procell delivers consistent 9V energy for your critical devices.
BULK BUY BULK SAVE - Economical 12-pack designed for seamless professional use and inventory management.
COMPACT LIGHTWEIGHT - Slim 11.4 x 5.1 x 0.5 cm design fits easily into any device or toolkit.
LONG TERM RELIABILITY - Maintains peak performance even after 7 years in storage—no surprises, just power.
TRUSTED BRAND QUALITY - Manufactured by Duracell, a global leader in dependable battery technology.

Duracell Procell 9V alkaline batteries come in a convenient 12-pack bulk package, engineered for long-lasting, reliable power with a shelf life of up to 7 years. Ideal for professional and industrial applications, these batteries combine compact design with trusted Duracell quality to keep your essential devices running smoothly.

Reviews

J**M

Good Customer Service

Delivered quickly, a letter was enclosed in the box explaining that the batteries are genuine Duracell, but in the latest company colour and design which I think is good customer service from the seller. Amazon need to change the photo on their web site!! The old photo is not the sellers fault. Too soon to give a full review yet, but as they are Duracell assume they will be good.

12.05.2022

F**

Great value for money.

This is the second box of batteries I bought of this type. I was very impressed with the first box which is why I got a second one. I have used them in my smoke alarms and various tools that need these batteries and they last much longer than the ordinary batteries, even normal Duracell batteries.

31.05.2022

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RM397

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Package Dimensions L x W x H	10.9 x 5.1 x 4.8 centimetres
Package Weight	0.59 Kilograms
Product Dimensions L x W x H	11.4 x 5.1 x 0.5 centimetres
Item Weight	277 g
Brand	PROCELL
Colour	BLACK/COPPER
Country of Origin	United States
Included components	Batteries
Part number	DURPC1604
Size	12 Count (Pack of 1)
Guaranteed software updates until	unknown

Duracell Procell Alkaline Batteries, 9V, 12/Box

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