---
product_id: 338238402
title: "SR521SW (379) Silver Oxide Watch Battery (Pack of 5)"
brand: "seizaiken"
price: "VT1845"
currency: VUV
in_stock: true
reviews_count: 8
category: "Seizaiken"
url: https://www.desertcart.vu/products/338238402-sr521sw-379-silver-oxide-watch-battery-pack-of-5
store_origin: VU
region: Vanuatu
---

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

**Brand:** seizaiken
**Price:** VT1845
**Availability:** ✅ In Stock

## Summary

> ⏱️ Power your moments with precision and planet-friendly tech!

## Quick Answers

- **What is this?** SR521SW (379) Silver Oxide Watch Battery (Pack of 5) by seizaiken
- **How much does it cost?** VT1845 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/338238402-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 second.
- • **Leak-Proof Design:** Advanced crimping technology prevents leaks, protecting your valuable devices.
- • **Eco-conscious Power:** Mercury-free silver oxide chemistry keeps your watch ticking sustainably.
- • **Ready for Your Wrist:** Pack of 5 batteries to keep your watches powered and stylishly punctual.
- • **Precision Manufacturing:** Crafted in ultra-clean environments for unmatched battery reliability.

## Overview

The SR512SW (335) Silver Oxide Watch Battery by Seiko Instruments delivers a stable 1.55V power source with zero mercury content, ensuring eco-friendly and reliable performance. Manufactured in a high-precision clean room with advanced leakage-resistant design, this pack of 5 batteries is ideal for maintaining your wristwatches with long-lasting, safe energy.

## 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.

Review: Good - Genuine product
Review: Good one. - A good product.

## 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 |
|---------------|-------|
| ASIN | B01EBCFWYG |
| Antenna Location | Watch |
| Battery Cell Composition | Silver Oxide |
| Battery Cell Type | Silver Oxide |
| Brand | Seizaiken |
| Brand Name | Seizaiken |
| Country of Origin | India |
| Customer Reviews | 3.9 out of 5 stars 135 Reviews |
| Item Type Name | watch |
| Manufacturer | Seiko Instruments Inc. |
| Net Quantity | 5 Count |
| Recommended Uses For Product | Watch |
| Reusability | Rechargeable |
| Unit Count | 5 Count |
| Voltage | 1.55 Volts |

## Product Details

- **Number of Batteries:** 5 Unknown batteries required.
- **Brand:** Seizaiken
- **Battery Cell Composition:** Silver Oxide
- **Recommended Uses For Product:** Watch
- **Net Quantity:** 5 Count
- **Voltage:** 1.55 Volts
- **Reusability:** Rechargeable
- **Battery Weight:** 20 Grams
- **Item dimensions L x W x H:** 16 x 7 x 5 Centimeters
- **Item Weight:** 48 Grams

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by M***I on 29 September 2024*

Genuine product

### ⭐⭐⭐⭐ Good one.
*by B***H on 19 May 2022*

A good product.

### ⭐⭐⭐⭐⭐ Working well
*by M***J on 18 June 2022*

It was very difficult to find this battery in the shop, found online and it is working perfectly in Swatch watch.

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**Shop now:** [https://www.desertcart.vu/products/338238402-sr521sw-379-silver-oxide-watch-battery-pack-of-5](https://www.desertcart.vu/products/338238402-sr521sw-379-silver-oxide-watch-battery-pack-of-5)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-06-05*