what is the mAh rating for this battery

According to the Duracell website it is 780

I am assuming they or new but what is the expiration date

Mine came dated March 2028 but that is the shelf life date not an expiration, generally these type of cells are given a 10 year shelf life which only means that they should still be good and useable up to time, currently i’m still using some that are dated 2013 in triage marker lights. The dates are on the batteries themselves that i received but not on the factory packages. I measured the voltage of them and got 3.3x on all which is as expected for this type of cell.

Are these duracell ultra lithium cr2 3v equivqlent to devices and rechargeres that take standard c or d batteries?

No they r very tiny batteries used for cameras and flashlights and stuff like that. Waaaay smaller than c or d batteries.

Do these batteries work in the first alert smoke detector?

These batteries work in the First Alert P1000 model smoke detectors, of which I purchased several from Costco in early 2013.

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Duracell CR2 3V High Power Lithium Battery, 2 Count, 10-Year Storage

Product ID: 6940467

Details

Battery Capacity
780
Battery Cell Composition
Lithium
Brand
DURACELL
Number of Batteries
2 Lithium
Recommended Uses For Product
Bicycle Camera

⚡3V High Power Output

🕒10-Year Storage Guarantee

❄️Extreme Temperature Reliability

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Description

🔋 Power your precision. Lasts a decade. Never miss a moment.

COMPACT YET MIGHTY - Lightweight 27g design fits seamlessly into specialty devices without bulk.
BUILT FOR THE ELEMENTS - Performs flawlessly in extreme temperatures—perfect for outdoor pros.
DECADE LONG SHELF LIFE - Stock up confidently with a guaranteed 10-year storage lifespan.
TRUSTED DURABILITY QUALITY - Backed by Duracell’s rigorous quality assurance and limited warranty.
UNMATCHED POWER FOR PRECISION GEAR - Delivers consistent 3V high-drain energy for cameras, flashlights & optical devices.

Duracell CR2 3V High Power Lithium batteries provide reliable, long-lasting energy tailored for high-drain specialty devices like compact cameras and laser rangefinders. Engineered with advanced lithium chemistry, they maintain consistent performance even in extreme temperatures and come with a 10-year storage guarantee, ensuring readiness whenever you need them.

Specifications

ASIN	B00005T3DX
Amperage	3 A
Antenna Location	Bicycle, Camera, Camera Flash, Photographic Lighting, Scooter
Battery Capacity	780
Battery Cell Composition	Lithium
Battery Cell Type	Lithium
Battery Weight	27.22 g
Brand	DURACELL
Compatible Phone Models	not compatible with phones
Customer Reviews	4.8 out of 5 stars 13,341 Reviews
Global Trade Identification Number	00041333013107
Included Components	battery 2 pack
Item Dimensions	0.63 x 3.5 x 3.5 inches
Item Type Name	2 pack battery
Item Weight	0.03 kg
Manufacturer	Duracell Distributing, Inc
Model Name	High Power LITHIUM CR2
Model Number	01310
Number of Batteries	2 Lithium Metal batteries required. (included)
Recommended Uses For Product	Bicycle, Camera, Camera Flash, Photographic Lighting, Scooter
Reusability	Single Use
UPC	041333013107
Voltage	3 volts
Warranty Description	Limited warranty

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€ 30.85

Duties & taxes included

In stock

Sold byAmazon FranceDelivered 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 France.

Secure transaction

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