5 x Sony SR521SW 379 AG0 LR521 Silver Oxide Button Battery Expire Date 12/2032 For Sale

⭐⭐⭐⭐⭐

👉📌 PLEASE READ BEFORE PURCHASE
💖 Need Help? Please Message Us First!
If you have any questions or concerns, please message us before opening a request (such as “Item Not Received”,If your order has not arrived within 7 days after payment, please message us directly so we can assist you right away). Messaging us directly is the fastest way to get help — we usually respond within a few hours and always within 1 business day.

💪 Contacting us first helps us resolve your issue quickly without delays from ’s process, and ensures the best possible service for you.(more than 95% orders arrive within 2~5 business days)

📬 Shipping Note:

📦 Shipping Options Available

We offer two shipping methods for your convenience:

1️⃣ Free Shipping(Primary default) – USPS First-Class Mail (no tracking number included).
2️⃣ USPS Ground Advantage – Includes a tracking number and faster visibility for your package.
➕ Additional cost: $4.75 (select this option at checkout).

Please choose the shipping method that best fits your needs before completing your purchase.

⭐Free Shipping---USPS FIRST-CLASS STANDARD SHIPPING in a white flat envelope. Please check your mailbox carefully, as it may arrive with your regular mail.

Thank you for your understanding and support!
— Mania Unlimited – Powered by Passion 💙

Item Description:

🔹 Brand New & Fresh Stock – Sony SR521SW silver oxide batteries, perfect for watches, calculators, and small electronics. Each battery is factory-sealed to ensure up to 3–5 years shelf life, so you can store them without losing performance.

✅ Specifications:

• Model: SR521SW (Also known as 379)

• Chemistry: Silver Oxide

• Nominal Voltage: 1.55V

• Diameter: 5.8 mm

• Height: 2.1 mm

• Capacity: ~18 mAh

• Shelf Life: 3–5 years (stored at room temperature)

• Brand: Sony (Made in Japan or Indonesia, depending on batch)

🔄 Compatible Model Numbers (Equivalents):
SR521SW, 379, SB-AC, 280-59, D379, V379, SR63, RW329, GP379, 379X, AG0 (silver oxide version), SR521

📌 Common Devices Using SR521SW:

• Watches (Casio, Seiko, Citizen, Timex, Fossil, Swatch, Bulova, etc.)

• Small electronic thermometers

• Laser pointers

• Key fobs

• Small medical devices (glucose meters, etc.)

💡 Why Buy Sony SR521SW?

• Long Shelf Life – Fresh from Sony for reliable performance when you need it.

• Stable Power Output – Perfect for sensitive devices like watches.

• Leak-Resistant Design – Protects your valuable electronics.

• Trusted Brand – Sony batteries are known for precision and reliability.

📦 Package Includes:

• 1Blister, (5 PCS) Sony SR521SW (379) Battery – Factory-Sealed Blister Pack

⚠ Note: Always check your device’s user manual or existing battery before purchase to ensure correct size and voltage.