---
product_id: 305063053
title: "SR521SW (379) Silver Oxide Watch Battery (Pack of 5)"
brand: "seizaiken"
price: "32 Lei"
currency: RON
in_stock: false
url: https://www.desertcart.ro/products/305063053-sr521sw-379-silver-oxide-watch-battery-pack-of-5
store_origin: RO
region: Romania
---

# 0% mercury eco-friendly 1.55V stable power leakage-resistant design SR521SW (379) Silver Oxide Watch Battery (Pack of 5)

**Brand:** seizaiken
**Price:** 32 Lei
**Availability:** ❌ Out of Stock

## Summary

> ⏰ Power your moments with precision and eco-conscious confidence!

## Quick Answers

- **What is this?** SR521SW (379) Silver Oxide Watch Battery (Pack of 5) by seizaiken
- **How much does it cost?** 32 Lei with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/305063053-sr521sw-379-silver-oxide-watch-battery-pack-of-5)

## Best For

- seizaiken enthusiasts

## Why This Product

- Trusted seizaiken brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable Voltage:** Consistent 1.55V output ensures flawless timekeeping every time 🔋
- • **Eco-Conscious Power:** Mercury-free silver oxide chemistry keeps your watch ticking sustainably 🌿
- • **Leak-Proof Assurance:** Advanced crimping technology prevents battery leaks, protecting your valuable watch 🛡️
- • **Precision Engineered:** Manufactured in a clean room environment for unmatched quality and reliability ⚙️
- • **Value Pack Convenience:** Five-pack supply means you’re always ready to power up without last-minute runs ⏳

## Overview

The SR521SW (379) Silver Oxide Watch Battery by Seiko Instruments delivers a stable 1.55V power source with zero mercury content, ensuring an environmentally safe and reliable energy solution. Engineered with advanced leakage resistance and produced in a high-precision clean room, this pack of five button cells offers long-lasting, contamination-free performance ideal for wristwatches.

## Description

EcologyThe introduction and adoption of new technologies made it possible to avoid using mercury and lead, which are environmentally harmful. Excellent leakage resistance Other than eliminating the need for mercury in the compound, these batteries are manufactured to have excellent leakage resistance attained by our newly developed crimping structure. This is made possible by our new high-performance manufacturing machinery and process.High reliability Production in our high precision clean room environment thoroughly prevents contamination – resulting in the most consistent, highest reliability battery.

## Features

- 0% Mercury
- SW Button cell 1.55V for Wrist Watch
- Environment Safe and Low Self Discharge
- Do not try to Charge it (Non - Rechargeable)
- Cell Battery for Watches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Seizaiken |
| Manufacturer | Seiko Instruments Inc. |
| Package Dimensions | 18.5 x 5 x 0.7 cm; 3 g |
| Compatible Devices | Watch |
| Voltage | 1.55 Volts |
| Power Source | battery powered |
| Battery Description | button cells |
| Batteries Required | No |
| Battery cell composition | Silver Oxide |
| Manufacturer | Seiko Instruments Inc. |
| Country of Origin | India |
| Item Weight | 3 g |

## Product Details

- **Brand:** Seizaiken
- **Battery Cell Composition:** Silver Oxide
- **Recommended Uses For Product:** Watch
- **Net Quantity:** 5 Count
- **Voltage:** 1.55 Volts
- **Reusability:** Rechargeable
- **Compatible Devices:** Watch
- **Manufacturer:** Seiko Instruments Inc.

## Images

![SR521SW (379) Silver Oxide Watch Battery (Pack of 5) - Image 1](https://m.media-amazon.com/images/I/81jYLytb69L.jpg)
![SR521SW (379) Silver Oxide Watch Battery (Pack of 5) - Image 2](https://m.media-amazon.com/images/I/819lCRWfuuL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How many year it will work**
A: Typically 1-2 years

**Q: Can I get only one quantity**
A: No, may not be practical for the seller

**Q: I need 100 batteries. What is the cost?**
A: Multiply by 10

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**Shop now:** [https://www.desertcart.ro/products/305063053-sr521sw-379-silver-oxide-watch-battery-pack-of-5](https://www.desertcart.ro/products/305063053-sr521sw-379-silver-oxide-watch-battery-pack-of-5)

---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-01*