They just show ( best before ) on the package. There is no date of manufacture. They usually last five years though. I always pull out the stem on my watches when I don’t use them for awhile to save the battery.

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Renata 399 SR927W Batteries - 1.55V Silver Oxide 399 Watch Battery (2 Count)

Product ID: 596530134

Details

Battery capacity
53 Milliamp
Battery cell composition
Silver Oxide
Brand
Renata
Number of batteries
2 Product
Recommended uses for product
Calculators

⚡1.55V Nominal Voltage

🔋53mAh High Capacity

🇨🇭Swiss Precision & Reliability

¥1822

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up your essentials with Swiss precision—never miss a moment!

DUAL PACK CONVENIENCE - Two batteries included to keep your essentials powered without interruption.
LEAKAGE RESISTANT DESIGN - Protect your valuable electronics with superior leakage resistance.
LONG LASTING POWER BOOST - Keep your devices running longer with 53mAh capacity and low self-discharge.
ULTRA COMPACT VERSATILITY - Perfect fit for watches, cameras, remotes, and more—power wherever you need it.
SWISS MADE QUALITY ASSURANCE - Experience consistent, premium performance from a trusted Swiss brand.

Renata 399 SR927W Silver Oxide batteries deliver reliable 1.55V power with 53mAh capacity, engineered in Switzerland for superior leakage resistance and long shelf life. Ideal for watches, cameras, keyless remotes, and more, this dual-pack ensures your devices stay energized with consistent, high-quality performance.

Specifications

ASIN	B09VVNG6SL
Antenna Location	Calculators,Camera,Car Security Alarm,Keyless Car Remotes,Watch,Watches
Battery Capacity	53 Milliamp Hours
Battery Cell Type	Silver Oxide
Best Sellers Rank	33,665 in Fashion ( See Top 100 in Fashion ) 70 in Watch Batteries
Brand Name	Renata
Customer Reviews	4.5 4.5 out of 5 stars (735)
Included Components	Battery
Item Weight	9 Grams
Manufacturer	Renata Batteries
Number of Batteries	2 Product Specific batteries required. (included)
Reusability	Single Use
UPC	040048065517
Unit Count	2 count
Voltage	1.55 Volts

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¥1822

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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