# Battery AVACOM for Asus VivoBook X421 S433 11.55V 3640mAh Li-ion

**URL:** https://aio.lv/en/product--avacom-noas-x421-42p--11199735
**Data updated:** 2026-03-20 09:48 (EET)
**Category:** Portable Device Batteries
**Manufacturer:** AVACOM
**Manufacturer code:** NOAS-X421-42P
**EAN:** 8591849093633
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 59.99 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 49.58 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--avacom-noas-x421-42p--11199735

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Rechargeable AVACOM replacement battery designed for Asus VivoBook X421 and S433 laptops. Nominal voltage 11.55V and capacity 3640mAh (Li-ion) provide reliable power for everyday mobile use, office tasks and multimedia. Compatible with specified models as a direct swap to restore runtime and portability. Intended for users needing a like-for-like OEM-style battery replacement.

## Long description

Rechargeable AVACOM replacement battery designed for Asus VivoBook X421 and S433 laptops. With a nominal voltage of 11.55V and a capacity of 3640mAh in Li-ion chemistry, this battery provides a direct like-for-like swap to restore portable operation and typical runtime for everyday mobile use, office work and multimedia playback.
Advantages
This AVACOM battery matches the original form factor and electrical specifications for compatible VivoBook X421 and S433 models, enabling straightforward installation without modification. Li-ion construction offers a balance of energy density and weight while supporting standard charging and discharge behavior. The battery is intended as a straightforward replacement to recover laptop autonomy and maintain system portability.
Suitable for
Asus VivoBook X421 series laptops requiring battery replacement
Asus VivoBook S433 models compatible with the same battery form factor
Users restoring battery runtime for office tasks, web browsing and video playback
Key specifications
Chemistry: Li-ion (lithium-ion)
Nominal voltage: 11.55 V
Rated capacity: 3640 mAh
Intended use: internal laptop battery replacement
Physical type: pack designed to fit specified VivoBook models
How to use
Power down the laptop, disconnect any external power source and remove the back cover following the manufacturer’s service instructions. Replace the depleted battery with the AVACOM unit, ensuring connector alignment and secure seating of the pack. Reassemble the laptop, connect the mains adapter, and allow the battery to charge fully before first use to allow the system to calibrate reported runtime.
Usage recommendations
Use the replacement battery with the appropriate charger and original-style power adapter supplied with the laptop. Avoid exposure to temperatures outside the laptop manufacturer’s specified operating range, and follow standard safety guidelines for Li-ion batteries: do not crush, puncture, short-circuit, or dispose of in fire. For best long-term performance, perform occasional full charge/discharge cycles and store the battery at roughly 40% charge if the laptop will be unused for extended periods.

## FAQ

### How much does the AVACOM battery for Asus VivoBook X421 S433 11.55V 3640mAh cost, and is it available for purchase?

The price is 59.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 15.07.2026 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 AVACOM 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 AVACOM 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/11199735/61982904_large.webp