# Battery MITSU B31N1726 for ASUS FX504 FX505 FX80G 3900mAh 44Wh 11.4V

**URL:** https://aio.lv/en/product--mitsu-bcas-fx504--11249336
**Data updated:** 2026-04-30 18:27 (EEST)
**Category:** Portable Device Batteries
**Manufacturer:** MITSU
**Manufacturer code:** BC/AS-FX504
**EAN:** 5904162455300
**Warranty:** 1 Year
**Availability:** Available for order
**Price:** 30.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 25.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mitsu-bcas-fx504--11249336

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.89 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Rechargeable laptop battery MITSU B31N1726 compatible with ASUS FX504, FX505 and FX80G series. Nominal capacity 3900 mAh (44 Wh) and nominal voltage 11.4 V provide reliable power for portable use. Designed to replace original B31N1726 cells, it supports everyday tasks, mobility and extended runtime for browsing, office work and light multimedia.

## Long description

Rechargeable laptop battery MITSU B31N1726 is compatible with ASUS FX504, FX505 and FX80G series and provides a nominal capacity of 3900 mAh (44 Wh) at 11.4 V. Designed as a replacement for original B31N1726 cells, this battery is intended to restore portable power to supported laptop models and extend runtime for everyday activities such as web browsing, office work and light multimedia playback.
Advantages
The MITSU B31N1726 battery offers a direct-fit replacement form factor and matching nominal voltage to work with specified ASUS models. With a rated 3900 mAh (44 Wh) capacity, it is intended to deliver consistent power for typical mobile tasks and moderate multi‑tasking. The battery is rechargeable and designed for straightforward installation in compatible laptop housings.
Suitable for
 Replacing a depleted or failing battery in ASUS FX504 series laptops
 Replacing a depleted or failing battery in ASUS FX505 series laptops
 Replacing a depleted or failing battery in ASUS FX80G series laptops
 Extending unplugged runtime for browsing, office applications and video playback
When it may not be suitable
This battery may not be suitable for laptops other than the specified ASUS FX504, FX505 and FX80G models; physical fit and electrical compatibility are limited to compatible models. It is not intended for uses requiring higher capacity or extended endurance beyond the rated 3900 mAh (44 Wh), nor as a substitute for batteries with a different nominal voltage.
Key specifications
 Nominal capacity: 3900 mAh (44 Wh)
 Nominal voltage: 11.4 V
 Compatibility: ASUS FX504, FX505, FX80G series
 Battery type: Rechargeable laptop battery (replacement cell pack)
How to use
Power down the laptop and disconnect any external power sources before starting. Remove the existing battery following the laptop manufacturer's instructions or service guide, then install the MITSU B31N1726 pack into the battery compartment ensuring proper alignment and secure connection. After installation, charge the battery fully using the laptop's original charger or compatible power adapter before first use. Observe standard battery handling precautions such as avoiding exposure to extreme heat, physical damage, or liquids.
What to consider before purchase
 Verify exact laptop model and compatibility with ASUS FX504, FX505 or FX80G series
 Confirm that a 11.4 V, 3900 mAh (44 Wh) battery meets your runtime expectations
 Check whether installation requires tools or professional service for your laptop model
 Ensure you have the original charger or a compatible adapter to recharge the battery
Usage recommendations
Charge the battery fully before first use and perform regular charge cycles to maintain capacity. Store the battery at moderate temperatures and avoid prolonged exposure to high heat. If the battery swells, shows signs of damage, or does not hold charge, discontinue use and replace it with an appropriate compatible pack.

## FAQ

### How much does the MITSU B31N1726 Laptop Battery for ASUS FX504 cost, and is it available for purchase?

The price is 30.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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 08.07.2026 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 MITSU 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 MITSU 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/11249336/62152254_large.webp