# Battery FUJITSU BT-1ST 4‑cell 3490mAh 50Wh rechargeable laptop battery

**URL:** https://aio.lv/en/product--fujitsu-cp815369-xx--4959118
**Data updated:** 2026-02-12 14:16 (EET)
**Category:** Portable Device Batteries
**Manufacturer:** FUJITSU
**Manufacturer code:** CP815369-XX
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 234.99 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 194.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fujitsu-cp815369-xx--4959118

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.08.2026 | free |
| Pickup points | 20.08.2026 | 1.79 EUR |
| Courier delivery to door | 20.08.2026 | 4.99 EUR |

## Summary description

Replacement rechargeable battery FUJITSU BT-1ST with 4 cells, 3490mAh capacity and 50Wh energy. Designed as a direct power source for compatible portable computers, it provides reliable runtime for mobile use, supports standard charging routines and is intended for on-the-go productivity, travel and daily laptop operation.

## Long description

Replacement rechargeable battery FUJITSU BT-1ST is a 4-cell laptop battery with a nominal capacity of 3490mAh and total energy of 50Wh. Designed to serve as a direct power source for compatible portable computers, this battery supports standard charging cycles and delivers portable runtime for travel, commuting and everyday mobile work. The battery is intended as an original-brand compatible power supply solution for systems that accept the FUJITSU BT-1ST form factor.
Advantages
The four-cell design balances capacity and weight to provide extended runtime without significantly increasing device bulk. With a rated energy of 50Wh and 3490mAh capacity, the battery offers predictable discharge behavior under typical laptop loads and is built to meet the manufacturer's electrical and physical interface requirements for a seamless replacement. It supports normal charging and discharging patterns and is suitable for regular daily use in portable computers.
Suitable for
 Replacing depleted batteries in compatible FUJITSU notebooks
 Extending runtime for travel and mobile work
 Use as a spare battery for daily commuting and office work
 Routine battery replacement to maintain predictable battery life
Key specifications
 Cell count: 4-cell configuration
 Capacity: 3490 mAh (nominal)
 Energy: 50 Wh (total)
 Battery type: Rechargeable lithium-ion battery designed for laptops
 Intended use: External internal replacement battery for compatible portable computers
How to use
Power down the laptop and disconnect any external power source before removing the existing battery. Follow the device manufacturer's instructions to unlock and remove the old battery, then align and install the FUJITSU BT-1ST replacement until it locks securely. Reconnect mains power and allow the battery to charge fully before first use to ensure correct calibration of the system's battery level indicators. Observe the laptop's battery status through the operating system or hardware indicators to verify normal operation.
Usage recommendations
Use standard charging routines and avoid exposing the battery to extreme temperatures. Store the battery in a cool, dry place if it will not be used for prolonged periods. For safety and long-term performance, use the laptop's original charger or a compatible power adapter, and follow the laptop manufacturer's maintenance and disposal guidelines.

## FAQ

### How much does the Battery FUJITSU BT-1ST 4‑cell 3490mAh 50Wh cost, and is it available for purchase?

The price is 234.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 15 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 17.08.2026 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. 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 FUJITSU 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 FUJITSU 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/4959118/66016663_large.webp