# Battery for Sony Ericsson K750i W800 W550i Z300 — Blue Star BST-37 Li‑Ion 1000 mAh

**URL:** https://aio.lv/en/product--blue-star-bs-bst-37--226743
**Data updated:** 2026-02-28 18:57 (EET)
**Category:** Portable Device Batteries
**Manufacturer:** blue star
**Manufacturer code:** BS-BST-37
**EAN:** 5901737121387
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 7.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blue-star-bs-bst-37--226743

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Rechargeable Li‑Ion replacement battery Blue Star BST-37 (1000 mAh) designed for Sony Ericsson models K750i, W800, W550i and Z300. Provides portable power for calls, messaging and media playback. Compatible with original battery contacts and form factor; suitable for on-the-go users needing a spare or replacement battery for older Sony Ericsson phones.

## Long description

BlueStar Battery Sony Ericsson K750i W800 W550i Z300 Li-Ion 1000 mAh Analog BST-37 is a replacement Li-Ion battery designed for select Sony Ericsson mobile phones. The battery offers 1000 mAh capacity and is presented as a high-quality analog alternative to original manufacturer batteries, intended to restore device runtime for everyday use in compatible models.
Advantages
The BlueStar battery provides equivalent functionality to original batteries, combining standard Li‑Ion chemistry with a 1000 mAh capacity. It is produced with attention to material selection and component quality to ensure reliable performance and durability for typical mobile phone applications.
Suitable for
Sony Ericsson K750i
Sony Ericsson W800i
Sony Ericsson W550i
Sony Ericsson Z300i
Other listed Sony Ericsson models such as K610i, K600i, W710i, W810i and similar phones
Key specifications
Battery type: Lithium‑Ion (Li‑Ion)
Capacity: 1000 mAh
Form factor: removable mobile phone battery compatible with specified Sony Ericsson models
Function: replacement/analog battery for extended device runtime
How to use
Power off the compatible Sony Ericsson phone before replacing the battery. Remove the back cover and take out the original battery according to the phone manufacturer’s instructions. Insert the BlueStar BST‑37 battery with correct polarity, replace the back cover and charge the phone fully before first use. Use the phone’s charger specified for the device model and follow normal charging routines.
Usage recommendations
Charge the battery with a compatible charger and avoid prolonged exposure to high temperatures. For best results, fully charge the battery before initial use and follow the device manufacturer’s guidance for storage and disposal of batteries.

## FAQ

### How much does the Blue Star BST-37 Li‑Ion 1000 mAh for Sony Ericsson cost, and is it available for purchase?

The price is 8.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 133 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 09.07.2026 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 blue star 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 blue star 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

https://aio.lv/img/cache/product/226743/4071437_large.webp