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: 426137899

Details

Battery Capacity
53
Battery Cell Composition
Silver Oxide
Brand
Renata
Number of Batteries
2 Product
Recommended Uses For Product
Calculators

⚡1.55V Nominal Voltage

🔋53mAh High Capacity

🛡️Superior Leakage Resistance

¥1461

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Stay Powered, Stay Ahead – Don’t Let Dead Batteries Slow You Down!

POWER THAT LASTS - Reliable 1.55V output ensures your devices run smoothly without interruption.
LONG LASTING ENERGY - 53mAh capacity delivers consistent performance, minimizing frequent replacements.
LEAKAGE PROOF DESIGN - Swiss-engineered to resist leakage, protecting your valuable electronics.
TRUSTED SWISS QUALITY - Renata’s precision manufacturing guarantees premium performance battery after battery.
VERSATILE COMPATIBILITY - Perfect for watches, cameras, calculators, car remotes, and more—stay powered everywhere.

Renata 399 SR927W Silver Oxide batteries provide a stable 1.55V power supply with 53mAh capacity, engineered in Switzerland for superior leakage resistance and long shelf life. Ideal for watches, cameras, calculators, and keyless car remotes, these batteries combine reliability and versatility to keep your essential devices running flawlessly.

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	#20,361 in Health & Household ( See Top 100 in Health & Household ) #143 in Coin & Button Cell Batteries
Brand	Renata
Customer Reviews	4.6 4.6 out of 5 stars (2,390)
Included Components	Battery
Item Weight	9 g
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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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥1461

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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