I need an AG1 battery, will this one work?

Yes, the 364 button battery is equivalent to the AG1.

does the 364 replace the sr621?

Yes, the 364 is a direct equivalent to an SR 621 and SR 621 SW.

This question is for the manufacturer. Can Duracell specify how long will it last once installed? I supposed they have tested it, so they should know.

That question is impossible to answer, even by the manufacturer. There are multiple factors that determine battery life. The most important is: What is the current drain of the device the battery is installed in?

Why does it say ‘ duracell – 319 1.5v silver oxide button battery’ but the battery i received was a 364?

That seems to be a typo by whoever wrote the ad copy.

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Duracell 364 Silver Oxide Button Battery, 1 Count Pack, 364 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More

Duracell 364 Silver Oxide Button Battery, 1 Count Pack, 364 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More

Product ID: 275366618

Details

Battery cell composition
Silver Oxide
Brand
Duracell
Number of batteries
1 Lithium Ion
Recommended uses for product
Calculator
Unit count
1 Count

⏳4-year guaranteed shelf life

⚡1.5V stable power

🔋18mAh high capacity

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RM94

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power your essentials with confidence—because every second counts!

COMPACT YET MIGHTY - Silver oxide chemistry delivers consistent 1.5V output with 18mAh capacity in a sleek button cell.
VERSATILE COMPATIBILITY - Fits multiple battery types (SR60, SR621W, 363) so you never have to worry about device compatibility.
LONG LASTING ENERGY STORAGE - Guaranteed fresh and ready for up to 4 years in storage—no more last-minute battery hunts.
TRUSTED BY PROFESSIONALS WORLDWIDE - Duracell’s #1 trusted brand status means you’re choosing proven reliability every time.
RELIABLE POWER FOR PRECISION DEVICES - Engineered to keep your watches, medical devices, and calculators running flawlessly.

The Duracell 364 Silver Oxide Button Battery delivers a reliable 1.5V power source with an 18mAh capacity, designed for precision devices like watches, medical instruments, and calculators. With a guaranteed 4-year shelf life and compatibility across multiple battery types, it ensures your critical electronics stay powered when it matters most. Trusted globally, Duracell combines longevity and performance in a compact, single-use battery.

Specifications

ASIN	B00006JPHB
Antenna Location	Calculator, Watch
Battery Cell Type	Silver Oxide
Battery Weight	0.15 Ounces
Brand	Duracell
Built-In Media	Duracell - 364
Compatible Phone Models	Watch
Customer Reviews	4.7 4.7 out of 5 stars (4,797)
Item Dimensions	6 x 44 x 89 millimeters
Item Type Name	Duracell D364BPK09 Silver Oxide Electronic Watch Battery, 364 Size, 1.55V, 18 mAh Capacity (Case of 6)
Item Weight	0.01 Pounds
Manufacturer	Duracell Distributing, Inc
Model Name	Watch battery
Model Number	D364BPK
Number of Batteries	1 Lithium Ion batteries required.
Reusability	Single Use
UPC	041333164090
Unit Count	1 Count
Voltage	1.5

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