# Button cell battery Murata - Sony SR521SW 1.55V silver-oxide (type SR521SW)

**URL:** https://aio.lv/en/product--murata-sony-bat379mu1--10808207
**Data updated:** 2026-02-13 15:35 (EET)
**Category:** Batteries
**Manufacturer:** murata - sony
**Manufacturer code:** BAT379.MU1
**EAN:** 3100000736781
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1.48 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 1.22 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--murata-sony-bat379mu1--10808207

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Silver-oxide button cell Murata - Sony SR521SW with nominal voltage 1.55V. Designed for small electronic devices such as watches, calculators, medical instruments and key fobs. Provides stable voltage output and relatively high capacity for its size, suitable for replacement in devices requiring SR521SW cells. Single-cell packaging, compatible with devices specifying SR521SW.

## Long description

Silver-oxide button cell Murata - Sony SR521SW provides a nominal voltage of 1.55V and is designed for use in compact electronic devices. This single-cell silver-oxide battery offers stable voltage output and performance characteristics commonly required by watches, small calculators, medical devices and remote key fobs. The cell is sized to match devices that call for the SR521SW form factor and polarity.
Advantages
The SR521SW silver-oxide chemistry ensures a consistent discharge curve and reliable voltage over the life of the cell, supporting accurate timekeeping and stable performance in precision instruments. Its compact form factor delivers relatively high capacity for its physical size, while low self-discharge helps preserve stored charge during infrequent use. Designed for compatibility with devices that specify SR521SW, the cell offers straightforward drop-in replacement without the need for adapters.
Suitable for
 Wristwatches and timepieces requiring SR521SW cells
 Small electronic calculators and measuring instruments
 Portable medical devices and hearing devices with matching battery size
 Key fobs, remote controls and small electronic toys
Key specifications
 Chemistry: silver-oxide
 Nominal voltage: 1.55 V
 Cell type / form factor: SR521SW (button cell dimensions and polarity for compatible devices)
 Packaging: single cell
 Typical application: low-drain to moderate-drain miniature electronics
How to use
Install the cell according to the device manufacturer’s instructions, observing correct polarity and ensuring the battery cavity is clean and dry. For most devices, press the new cell into the compartment until it sits securely and replace any retaining clips or covers. After installation, verify device function such as timekeeping or display operation. Remove depleted cells promptly and replace with the same cell type to avoid contact damage or leakage-related faults.
Usage recommendations
Store unused cells in a cool, dry place away from direct sunlight and heat sources. Keep batteries out of reach of children and dispose of used cells according to local regulations for battery recycling. Do not attempt to recharge, disassemble or short-circuit the cell. When replacing batteries in devices used for critical measurements, verify accuracy after replacement and perform periodic checks as recommended by the device manufacturer.

## FAQ

### How much does the Battery Murata - Sony SR521SW 1.55V cost, and is it available for purchase?

The price is 1.48 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All murata - sony products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized murata - sony service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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