# Button cell battery Maxell SR927SW 1.55V Silver Oxide (size 399, SR57)

**URL:** https://aio.lv/en/product--button-cell-battery-maxell-sr927sw-155v-silver-oxide-size-399-sr57--3588014
**Data updated:** 2026-02-12 09:54 (EET)
**Category:** Batteries
**Manufacturer code:** BAT395.MX1
**EAN:** 3100000528164
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 2.27 €
**Prices and availability valid until:** 2026-08-10 23:59
**Price without VAT (21%):** 1.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--button-cell-battery-maxell-sr927sw-155v-silver-oxide-size-399-sr57--3588014

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

Maxell SR927SW is a 1.55V silver oxide button cell (size 399, also known as SR57) suitable for small electronic devices such as watches, calculators, medical instruments and some sensors. Offers stable voltage and reliable performance for low-drain to moderate-drain applications. Compact form factor ensures easy replacement and compatibility with devices specifying SR927SW/SR57/399 cells.

## Long description

Maxell SR927SW is a 1.55V silver oxide button cell (size 399, also known as SR57) designed for use in compact electronic devices. It provides a stable nominal voltage and consistent discharge characteristics suitable for low-drain to moderate-drain applications. The cell's compact dimensions make it compatible with devices that specify SR927SW, SR57 or 399 size batteries, allowing straightforward replacement and maintenance.
Advantages
This silver oxide cell delivers stable voltage over most of its service life, supporting accurate timekeeping and reliable operation of small electronics. Its chemistry resists leakage under normal use and offers better capacity retention at low current draws compared with alkaline button cells of similar size. The standardized size and polarity ensure compatibility with many watches, calculators, medical instruments and sensors that require an SR927SW/SR57/399 battery.
Suitable for
 Wristwatches and horological instruments
 Calculators and small handheld electronics
 Medical devices such as thermometers and glucometers (if manufacturer permits)
 Optical instruments, sensors and small measuring tools
Key specifications
 Chemistry: Silver oxide
 Nominal voltage: 1.55 V
 Form factor: Button cell (size 399 / SR57)
 Typical applications: Low- to moderate-drain electronic devices
 Polarity: Positive top
How to use
Before replacing the battery, verify the device documentation to confirm compatibility with an SR927SW (size 399 / SR57) cell. Power off the device or remove it from service, then open the battery compartment following the manufacturer's instructions. Observe correct polarity when inserting the new cell and ensure the contact surfaces are clean and free of corrosion. After installation, secure the battery cover and power on the device to verify normal operation. Dispose of the used battery according to local regulations for battery recycling.
Usage recommendations
Store unused cells in a cool, dry place away from direct sunlight and heat sources. Avoid mixing new and used batteries or different chemistries in the same device. For devices with critical measurement or medical functions, replace the battery at regular intervals recommended by the device manufacturer and confirm proper operation after replacement.

## FAQ

### How much does the Maxell SR927SW 1.55V silver oxide button cell cost, and is it available for purchase?

The price is 2.27 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 20.07.2026 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.

### 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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