# Notebook battery Asus C21N1818 4385mAh original replacement for compatible Asus laptops

**URL:** https://aio.lv/en/product--asus-nb431519--4431967
**Data updated:** 2025-12-29 17:20 (EET)
**Category:** Portable Device Batteries
**Manufacturer:** Asus
**Manufacturer code:** NB431519
**EAN:** 9990000431519
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 67.49 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 55.78 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--asus-nb431519--4431967

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Original Asus notebook battery C21N1818 with 4385mAh capacity designed as a replacement power unit for compatible Asus laptops. Provides portable power for everyday mobile use, restores battery runtime, and supports standard charging and safety features of original batteries. Suitable for users needing a direct OEM replacement to recover mobility and productivity.

## Long description

Original Asus notebook battery C21N1818 with a capacity of 4385mAh and nominal voltage 7.3V. This replacement battery is designed for compatible Asus VivoBook models and restores portable power for everyday mobile use while supporting standard charging and safety behavior of original cells.
Advantages
The battery uses high-quality lithium-ion cells and compatible charging microcontrollers to provide balanced performance and reliable charging cycles. It delivers the rated capacity without memory effect and is manufactured to match standard OEM dimensions for direct replacement. A 12-month warranty is provided.
Suitable for
Replacing a worn or defective battery in compatible Asus VivoBook laptops
Restoring battery runtime for mobile productivity and everyday use
Users seeking an original-spec replacement (C21N1818)
Key specifications
Capacity: 4385mAh
Voltage: 7.3V (nominal)
Cell type: Li-ion
Compatible part numbers: C21N1818, C21N1818-1, C21N1818-2 and listed OEM codes
Manufacturer brand: Asus
Warranty: 12 months
How to use
Power down the laptop and disconnect any power adapter. Remove the service cover or back panel following the laptop manufacturer’s instructions, then swap the original battery with this replacement, ensuring the connector is fully seated and secured. Reassemble the laptop and charge the new battery fully before first use.
Usage recommendations
For compatibility, verify your laptop model or part number against the compatible models and part numbers (for example C21N1818) listed for this battery. If uncertain, consult a technician or product consultant before purchase.

## FAQ

### How much does the Notebook battery Asus C21N1818 4385mAh cost, and is it available for purchase?

The price is 67.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 02.07.2026 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 Asus 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 Asus 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/4431967/51276306_large.webp