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

⚡53mAh High Capacity

🔋1.55V Nominal Voltage

🇨🇭Swiss Precision & Reliability

R174

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Stay charged, stay ahead – power your essentials with Swiss precision!

POWER THAT LASTS - Consistent 1.55V output ensures your devices run smoothly without interruption.
SWISS MADE QUALITY - Trusted Swiss craftsmanship guarantees premium performance battery after battery.
LONG LASTING ENERGY - 53mAh capacity delivers reliable performance with low self-discharge for extended shelf life.
VERSATILE COMPATIBILITY - Perfect for watches, cameras, calculators, car remotes, and more—stay powered everywhere.
LEAKAGE RESISTANT DESIGN - Superior leakage protection safeguards your valuable electronics from damage.

Renata 399 SR927W Silver Oxide batteries provide a reliable 1.55V power source with 53mAh capacity, featuring superior leakage resistance and low self-discharge. Swiss-made for consistent, high-quality performance across a wide range of devices including watches, cameras, and keyless car remotes.

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	#20,557 in Health & Household ( See Top 100 in Health & Household ) #146 in Coin & Button Cell Batteries
Brand	Renata
Customer Reviews	4.6 4.6 out of 5 stars (2,391)
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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R174

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

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