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)

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

¥1706

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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 and zero leaks!

SWISS PRECISION - Crafted with Swiss quality for consistent, dependable performance every time.
POWER THAT LASTS - Reliable 1.55V output ensures your devices stay energized longer.
LOW SELF DISCHARGE - High capacity retention during storage means your batteries are ready when you are.
LEAK PROOF CONFIDENCE - Advanced silver oxide chemistry offers superior leakage resistance to protect your devices.
VERSATILE COMPATIBILITY - Perfect for watches, calculators, cameras, car alarms, and keyless remotes—stay powered across all essentials.

Renata 399 SR927W Silver Oxide batteries deliver a stable 1.55V and 53mAh capacity with superior leakage resistance. Trusted Swiss-made quality ensures consistent performance across a wide range of devices including watches, cameras, calculators, and car security systems. Low self-discharge keeps them ready for use even after long storage.

Specifications

ASIN	B09VVNG6SL
Antenna Location	Calculators,Camera,Car Security Alarm,Keyless Car Remotes,Watch,Watches
Battery Capacity	53 milliamp_hours
Battery Cell Composition	Silver Oxide
Battery Cell Type	Silver Oxide
Best Sellers Rank	#17,024 in Health & Household ( See Top 100 in Health & Household ) #126 in Coin & Button Cell Batteries
Brand	Renata
Customer Reviews	4.6 out of 5 stars 2,383 Reviews
Included Components	Battery
Item Weight	9 g
Manufacturer	Renata Batteries
Number of Batteries	2 Product Specific batteries required. (included)
Recommended Uses For Product	Calculators,Camera,Car Security Alarm,Keyless Car Remotes,Watch,Watches
Reusability	Single Use
UPC	040048065517
Unit Count	2 Count
Voltage	1.55 volts

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¥1706

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

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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