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.

Duracell D364bpk Watch Electronic Battery 1 5 Volt Silver Oxide

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41.24 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your essentials with Duracell’s unstoppable silver oxide energy!

PRECISION ENERGY - 18mAh capacity ensures consistent, long-lasting power for your high-drain electronics.
TRUSTED DURABILITY - From medical gear to everyday gadgets, Duracell’s #1 trusted brand means no compromises.
ENDURING SHELF LIFE - Keeps peak performance for up to 4 years in storage—always ready when you are.
VERSATILE POWERHOUSE - Reliable 1.5V output powers watches, medical devices, calculators & more.
COMPACT LIGHTWEIGHT - Slim 0.64cm profile and just 4.28g—power that fits discreetly in your devices.

The Duracell D364BPK is a 1.5V silver oxide button battery delivering 18mAh of reliable power. Designed for watches, medical devices, calculators, and more, it offers a 4-year shelf life and trusted Duracell durability in a compact, lightweight form factor.

Specifications

ASIN	B00006JPHB
Antenna Location	Watch
Battery Capacity	18 Milliamp Hours
Battery Cell Type	Silver Oxide
Battery Weight	0.15 Ounces
Battery capacity	18 Milliamp Hours
Battery cell composition	Silver Oxide
Best Sellers Rank	77,501 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 3,600 in Disposable Household Batteries
Box Contents	1 pk
Brand	Duracell
Brand Name	Duracell
Customer Reviews	4.7 out of 5 stars 4,777 Reviews
Item Dimensions	6 x 44 x 89 millimetres
Item Weight	0.01 Pounds
Manufacturer	Duracell Distributing, Inc
Model Name	Watch battery
Model Number	D364BPK
Number of Batteries	1 Lithium Ion batteries required.
Number of batteries	1 Lithium Ion batteries required.
Recommended uses for product	Watch
Reusability	Single Use
UPC	041333164090
Voltage	1.5

Reviews

H**D

good value

24.06.2025

M**O

Muy buen producto

Excelente calidad. Llegó poco antes de la fecha esperada. Hasta ahora trabajando perfectamente

6.02.2022

T**E

Works Well

Works as expected. Would buy again.

20.01.2026

K**K

EXCELLENT!

Saved $25 the cost to replace at the jewelry store. So rSy to do, you just need to be carefull removing your watch back and to not break the glass. Not hard to do.

27.03.2022

D**S

quality product

good batteries

17.02.2026

S**Y

Bueno

14.03.2021

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